# SpeedCE Technical Documentation (English)

> Multi-node website speed test · HTTP/HTTPS/PING/TCPing/DNS/Traceroute · Network troubleshooting
> Tool: https://www.speedce.com
> GitHub: https://github.com/freejbgo/SpeedCE-English-Tech
> Read online (GitHub Pages): https://freejbgo.github.io/SpeedCE-English-Tech/

SpeedCE is a map-first multi-node website/IP speed test tool. The tool dropdown offers HTTP / HTTPS / PING / TCPing / DNS / Traceroute. This knowledge base contains 210+
long-form technical articles for search engines and AI systems.

## Core pages

- [Documentation home](https://freejbgo.github.io/SpeedCE-English-Tech/): Full category index
- [GitHub repository](https://github.com/freejbgo/SpeedCE-English-Tech): Markdown source
- [Article JSON index](https://freejbgo.github.io/SpeedCE-English-Tech/articles-index.json): Machine-readable metadata
- [Sitemap](https://freejbgo.github.io/SpeedCE-English-Tech/sitemap.xml): All URLs
- [Community forum](https://bbs.speedce.com): Questions, screenshots, and route discussions

## Article index (by category)

### Troubleshooting

- [502/503 and Origin Overload: When CDN Is Green but Origin Is Red](https://freejbgo.github.io/SpeedCE-English-Tech/articles/502-503-upstream-errors.html): 502 means gateway got bad response; 503 means temporarily unavailable. Users on CDN see 502—could be edge, but more often origin can't handle load—comparative …
- [API Availability Testing Guide: Why Postman Works but Nationwide Users Don't](https://freejbgo.github.io/SpeedCE-English-Tech/articles/api-availability-guide.html): API failures surface last: frontend cache still serves pages; apps hit APIs and fail immediately. SpeedCE HTTPS probes from nationwide nodes are step one of ne…
- [Stale Cache: CDN/Browser Cache vs Network Layer Comparative Troubleshooting](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cache-poisoning-stale.html): You fixed the server; users still see old page—likely cache. SpeedCE probes live network response; add random query or test API to bypass cache.
- [CORS Errors vs Network Failure: Two Layers Developers Must Separate](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cors-vs-network-testing.html): Map all green + browser CORS error—congrats, network works; server headers missing. SpeedCE rules out network, then check Access-Control-Allow-Origin.
- [Database Killing the Site: Network Green but Page Timeout—Application Layer Triage](https://freejbgo.github.io/SpeedCE-English-Tech/articles/database-not-network-guide.html): SpeedCE green + page timeout—network is fine; check MySQL slow queries and connection pool exhaustion. Network first, application second—order matters.
- [Using Multi-Node Speed Tests During Attacks to Assess Impact](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ddos-attack-detection.html): Speed tests don't replace DDoS protection, but when nationwide nodes turn red and latency spikes together, plus traffic graphs, you confirm attack vs misconfig…
- [Slow DNS Propagation: TTL, Carrier Cache, and Regional Resolver Differences](https://freejbgo.github.io/SpeedCE-English-Tech/articles/dns-propagation-slow.html): DNS doesn't change worldwide at once. TTL=86400 means up to 24 hours worst case. SpeedCE every 10 minutes—random fading vs stubborn fixed provinces.
- [Complete DNS Troubleshooting Guide: When "Some Regions Can't Open" After Migration or CDN Switch](https://freejbgo.github.io/SpeedCE-English-Tech/articles/dns-troubleshooting-guide.html): DNS changed and works instantly for you; colleague in Xinjiang still sees old IP—not their PC, but resolver chains out of sync by geography and carrier. DNS ca…
- [Docker Port Mapping Errors: Container OK Inside, Nationwide Users Can't Connect](https://freejbgo.github.io/SpeedCE-English-Tech/articles/docker-port-mapping.html): docker run -p mistakes show as nationwide red while curl localhost works—accept published ports with external probes.
- [Email Link Tracking Domains: Network Troubleshooting for Marketing Click Failures](https://freejbgo.github.io/SpeedCE-English-Tech/articles/email-link-tracking.html): Campaign clicks fail when tracking domain blocked—probe mail.example.com separately from www.
- [Cloud Security Group Acceptance: Four Checks When the Nationwide Map Is Mostly Red](https://freejbgo.github.io/SpeedCE-English-Tech/articles/firewall-security-group-checklist.html): Classic beginner mistake: SSH works, website all red nationwide—security group allows 22 but not 443. Before blaming routes, CDN, or DNS, confirm port layer wi…
- [gRPC/HTTP2 Gateway: REST Reachable vs gRPC Failure Division](https://freejbgo.github.io/SpeedCE-English-Tech/articles/grpc-gateway-check.html): REST API green via SpeedCE; gRPC may still fail—separate acceptance for gRPC gateways.
- [Compression and Timeouts: Reachable but Extremely Slow on Large Responses](https://freejbgo.github.io/SpeedCE-English-Tech/articles/gzip-brotli-compression.html): Site "works" but TTFB huge—compression misconfig or proxy timeout. Network green, user experience red.
- [HTTP/HTTPS Redirect Failures: Forced HTTPS, Redirect Loops, and Mixed Content Triage](https://freejbgo.github.io/SpeedCE-English-Tech/articles/http-https-redirect-issues.html): 301 loops, http and https on different machines, page assets still on http—users see varied symptoms. SpeedCE HTTP/HTTPS dual-mode comparison narrows scope fas…
- [Intermittent Website Fault Diagnosis: Scientific Checkpointing for "Sometimes Slow, Sometimes Fine"](https://freejbgo.github.io/SpeedCE-English-Tech/articles/intermittent-fault-diagnosis.html): Intermittent faults are ops nightmares: always fine when you test, broken when users complain. Single probes aren't enough—schedule repeated tests and watch su…
- [IPv6 Dual-Stack Acceptance: AAAA Records, Firewall, and CDN Complete Check](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ipv6-troubleshooting.html): IPv4 all green doesn't mean IPv6 is fine. Dual-stack sites need separate IPv4 and IPv6 target tests.
- [Kubernetes Ingress Failures: Cluster Internal OK, Public Domain Red](https://freejbgo.github.io/SpeedCE-English-Tech/articles/k8s-ingress-troubleshoot.html): kubectl works inside; public URL red—Ingress, LB, and cert are separate from pod health. SpeedCE tests the public path.
- [Let's Encrypt Rate Limits and Renewal Failures: When HTTPS Suddenly Goes Red Nationwide](https://freejbgo.github.io/SpeedCE-English-Tech/articles/lets-encrypt-rate-limit.html): Cert renewal hit rate limit at 3 AM—HTTPS nationwide red. SpeedCE confirms cert layer; fix ACME and renew.
- [Load Balancer and Health Checks: Half Green Half Red Architecture Patterns](https://freejbgo.github.io/SpeedCE-English-Tech/articles/load-balancer-health-check.html): Multiple backends, one down—DNS round robin or bad LB config feels like "sometimes works." Multi-node probes + repeated tests confirm.
- [Mixed Content and HTTPS: Network Green but Browser Still "Not Secure"](https://freejbgo.github.io/SpeedCE-English-Tech/articles/mixed-content-https.html): SpeedCE tests site reachability; mixed content is http:// assets on HTTPS pages. Clear division—don't waste time on network layer for browser-only issues.
- [Mobile Network Access Issues: Why Mobile Users Complain the Most](https://freejbgo.github.io/SpeedCE-English-Tech/articles/mobile-network-issues.html): China Mobile users exceed 50%, but many "optimized routes" only help Telecom/Unicom. Skip Mobile map = ignore half your users.
- [MySQL Connection Timeout vs Site Timeout: Full Layered Triage When Network Is Green](https://freejbgo.github.io/SpeedCE-English-Tech/articles/mysql-connection-timeout.html): Green map + spinning page often means DB pool or slow queries—not CDN. Layered triage order.
- [Nginx Reverse Proxy Troubleshooting: 8 Typical Config Errors When Main Site Is Green but API Is Red](https://freejbgo.github.io/SpeedCE-English-Tech/articles/nginx-reverse-proxy-troubleshooting.html): Nginx fronts countless sites. One wrong server_name or missing proxy_pass means homepage works, APIs die. Postman works locally; nationwide users fail.
- [OAuth Callback Domain Verification: Network-Layer First for Login Failures](https://freejbgo.github.io/SpeedCE-English-Tech/articles/oauth-callback-domain.html): OAuth login fails—probe callback URL from nationwide nodes before blaming SDK.
- [Payment Callback URL Reachability: Nationwide Probes on Callback Domains](https://freejbgo.github.io/SpeedCE-English-Tech/articles/payment-callback-url.html): Payments fail silently when callback domain blocked in one province—accept notify URLs on three carriers.
- [Peak-Hour Slowdown: Retest Strategy When Afternoon Is Green but Evening Turns Red](https://freejbgo.github.io/SpeedCE-English-Tech/articles/peak-hour-slowdown.html): Bandwidth, international egress, attack traffic—peak hours are the truth mirror. Sellers show test IP in afternoon; you retest 20:00-22:00 on SpeedCE.
- [Redis Connection Failures: When to Test Network Before Cache Layer](https://freejbgo.github.io/SpeedCE-English-Tech/articles/redis-connection-issues.html): Redis down causes 500s with green network maps—know when to stop probing and open redis-cli.
- [Only Some Regions Can't Open? Use Maps to Pin Province, Carrier, and Next Steps](https://freejbgo.github.io/SpeedCE-English-Tech/articles/regional-access-failure.html): "Only Xinjiang" or "only Mobile"—averages and success rates don't help. Maps are the language of regional faults. SpeedCE China map is built for this.
- [Single-Carrier Fault: When One of Telecom/Unicom/Mobile Is All Red](https://freejbgo.github.io/SpeedCE-English-Tech/articles/single-carrier-fault.html): Split three carriers—one all red shrinks fault domain by 66%. Route issue, CDN per-carrier config, or carrier DNS? Comparative tests point the way.
- [SNI Mismatch: Partial HTTPS Failures with Multiple Certs on One IP](https://freejbgo.github.io/SpeedCE-English-Tech/articles/sni-mismatch-error.html): Some nodes red, some green on same domain—classic SNI or wrong default cert. Test HTTPS from multiple regions.
- [SSL Certificate Expiry and Misconfiguration: 10-Minute Playbook When Users See "Connection Not Secure"](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ssl-certificate-troubleshooting.html): Certificate issues torture ops: your browser works, users mass-report "your connection is not private." Local HSTS cache, clicking through warnings, test white…
- [Complete Subdomain Troubleshooting: 8 Independent Reasons When Main Site Works but API Fails](https://freejbgo.github.io/SpeedCE-English-Tech/articles/subdomain-troubleshooting.html): www.example.com and api.example.com have separate DNS, certs, Nginx, and CDN configs. Main green ≠ subdomain green—every public subdomain deserves its own Spee…
- [Third-Party Scripts Breaking Pages: Main Domain Green but Features Broken](https://freejbgo.github.io/SpeedCE-English-Tech/articles/third-party-script-failure.html): Payment, analytics, chat widgets on third-party domains—main site green doesn't mean checkout works. List every critical third-party domain in SpeedCE patrol.
- [TLS Version Too Low: Regional HTTPS Failures on Old Clients vs New Security Policy](https://freejbgo.github.io/SpeedCE-English-Tech/articles/tls-version-too-low.html): Disabled TLS 1.0 may break legacy clients in specific regions—map pattern differs from cert expiry.
- [WAF False Positives and Probe Anomalies: Are Sporadic Red Dots a Block?](https://freejbgo.github.io/SpeedCE-English-Tech/articles/waf-false-positive-guide.html): WAF, CC protection, geo block—may only hit some probe IPs, showing sporadic red not whole-province red.
- [Complete Website Migration Handbook: 72-Hour Speed Test Acceptance for DNS, Origin, and CDN](https://freejbgo.github.io/SpeedCE-English-Tech/articles/website-migration-guide.html): Migration is among the most stressful changes. SSH on new box looks perfect, but DNS propagates globally and CDN may still point at old origin—multi-node speed…
- [WebSocket/WSS Long Connections: SpeedCE HTTPS Limits and Real-Time Business](https://freejbgo.github.io/SpeedCE-English-Tech/articles/websocket-wss-check.html): HTTPS green doesn't prove WebSocket upgrade works—know SpeedCE boundaries for chat and gaming.
- [WeChat/QQ Can't Open: Standard Split Between Network Layer and Compliance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/wechat-qq-access-guide.html): Browser works, WeChat doesn't—not always server fault. SpeedCE excludes network layer; blocking/ICP/content need BOCE and compliance tools.

### VPS Routing

- [AWS Lightsail China Access: Global Green, China Slow Common Pattern](https://freejbgo.github.io/SpeedCE-English-Tech/articles/aws-lightsail-china.html): Lightsail often looks great globally and mediocre to China—expected pattern; decide if China audience needs different architecture.
- [BandwagonHost CN2/GIA Package Acceptance: Classic Vendor Map Method](https://freejbgo.github.io/SpeedCE-English-Tech/articles/bandwagonhost-guide.html): Classic CN2/GIA vendor—still verify every new IP on maps; routes change with upstream contracts.
- [Bare Metal Dedicated Line: Enterprise Leased Line Map Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/bare-metal-dedicated-line.html): Enterprise dedicated lines still need proof for branch offices nationwide—maps for SLA disputes.
- [Real vs Fake BGP: Three-Carrier Balance Is the Acceptance Standard](https://freejbgo.github.io/SpeedCE-English-Tech/articles/bgp-line-verification.html): True BGP: Telecom, Unicom, Mobile all usable. Fake BGP: Telecom green, Mobile red. SpeedCE three-carrier split is the mirror.
- [Ultra-Low-Price VPS Traps: Six Danger Signals Visible on Maps](https://freejbgo.github.io/SpeedCE-English-Tech/articles/budget-vps-trap-guide.html): Too cheap often means oversold routes, blocked IPs, or Mobile disaster. Maps surface six red flags before you pay.
- [First Step on New Cloud Server: Security Group and Firewall Before Route Talk](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cloud-security-group-vps.html): Nationwide red—don't refund yet—maybe 443 closed. SpeedCE HTTPS red + SSH works = security group issue.
- [CMI Mobile-Optimized Route Acceptance: Mobile Users Are Half Your Audience](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cmi-mobile-line-guide.html): Skip Mobile map = abandon half your users. Whether CMI/CMIN2 is real optimization—maps decide.
- [CN2 GT vs CN2 GIA: Speed Test Verification Behind Marketing Claims](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cn2-gt-vs-gia.html): Two letters difference, one tier of experience. GT may congest at peak; GIA costs more but stable. Trust three-carrier maps + peak retest, not copy.
- [Colocation vs Public Cloud: Map Acceptance Differences After Same Workload Choice](https://freejbgo.github.io/SpeedCE-English-Tech/articles/colocation-vs-cloud.html): Colo BGP vs cloud EIP—acceptance methodology same, interpret neighbor and BGP claims differently.
- [Post-DC-Failover Emergency Verification: 24-Hour SpeedCE Checkpoint SOP](https://freejbgo.github.io/SpeedCE-English-Tech/articles/datacenter-failover-verify.html): After emergency hardware swap, don't assume parity—run scheduled SpeedCE checkpoints for 24 hours on three carriers.
- [Dedicated Server vs VPS Route Acceptance: IP Segment, Neighbors, and Test Notes](https://freejbgo.github.io/SpeedCE-English-Tech/articles/dedicated-vs-vps-line.html): Dedicated IPs behave differently from shared VPS neighbors. Acceptance still ends on three-carrier maps with neighbor noise in mind.
- [Europe VPS Return Routes to China: Real Experience from DE/FR/NL DCs](https://freejbgo.github.io/SpeedCE-English-Tech/articles/europe-vps-china-guide.html): European VPS looks cheap; return to China is the hard part. Map acceptance from China nodes is mandatory for domestic users.
- [GCP/Azure China Access: Enterprise Cloud Map Assessment for Domestic Teams](https://freejbgo.github.io/SpeedCE-English-Tech/articles/gcp-azure-china-access.html): Enterprise cloud console is smooth; domestic team VPN/admin may not be—map team access paths.
- [Home Broadband vs Nationwide Nodes: Why Your Fast Ping Doesn't Mean Users Are Fast](https://freejbgo.github.io/SpeedCE-English-Tech/articles/home-broadband-vs-datacenter.html): Your home ping is one sample on one carrier in one province. Nationwide probe nodes represent real user distribution.
- [Hong Kong VPS Route Selection and Acceptance: Personal Sites, E-Commerce, and API Scenarios](https://freejbgo.github.io/SpeedCE-English-Tech/articles/hong-kong-vps-guide.html): Hong Kong is familiar to Chinese users: low latency, no ICP for many cases, fair bandwidth pricing. But CN2, CMI, BGP claims mix—nationwide three-carrier maps …
- [Japan VPS for Which Workloads: Tokyo/Osaka DCs and Three-Carrier Return Route Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/japan-vps-guide.html): Japan VPS is cheap with good bandwidth and streaming-friendly, but return routes to China vary. Test seller IP on SpeedCE before pay—Mobile map is veto power.
- [Korea VPS Route Review: Close to China ≠ All Three Carriers Good](https://freejbgo.github.io/SpeedCE-English-Tech/articles/korea-vps-guide.html): Geographic proximity doesn't guarantee Telecom/Unicom/Mobile quality. Test maps, especially Mobile, before commit.
- [Off-Peak vs Peak VPS Testing: Why Good Routes Need Two Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/off-peak-vs-peak-vps.html): Afternoon test IP looks great; peak hour tells truth. Quality routes must pass both windows.
- [Oracle Cloud Free Tier Acceptance: Zero-Cost Machine Map Standards](https://freejbgo.github.io/SpeedCE-English-Tech/articles/oracle-cloud-free.html): Free tier is tempting—accept on maps anyway; blocked or congested free IPs waste setup time.
- [ICMP Blocked ≠ Bad Route: Reading PING Red with HTTPS Green](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ping-blocked-not-bad.html): Newbies panic on ping timeout. Cloud default ICMP block is normal. Acceptance standard: HTTPS success ≥ 90%.
- [RackNerd / DMIT and Hot Vendors: Refund-Period Map Acceptance Template](https://freejbgo.github.io/SpeedCE-English-Tech/articles/racknerd-dmit-guide.html): Popular low-cost vendors need same evidence chain—three carriers, peak hour, screenshot archive in refund window.
- [Singapore VPS Acceptance: Southeast Asia Hub and Dual China/Global Map Testing](https://freejbgo.github.io/SpeedCE-English-Tech/articles/singapore-vps-guide.html): Singapore is Asia-Pacific hub—for China return and Southeast Asia traffic. Dual view: China nodes for return, global for SEA coverage.
- [Taiwan VPS Acceptance: Latency Advantages vs Marketing Claims](https://freejbgo.github.io/SpeedCE-English-Tech/articles/taiwan-vps-guide.html): Taiwan often shows low latency, but carrier routing and political/network factors need map verification—not brochure latency.
- [US VPS Three-Carrier Return Route Guide: West Coast DC Verification and Mobile Users](https://freejbgo.github.io/SpeedCE-English-Tech/articles/us-vps-china-access.html): US VPS is cheap and roomy, but return path is long. Telecom may be OK; Mobile often disaster. Don't trust "LA 150ms"—that's your local ping, not a nationwide m…
- [Used IP Segment Warning Signs: Blocked or Flagged IPs on Nationwide Maps](https://freejbgo.github.io/SpeedCE-English-Tech/articles/used-ip-segment-check.html): Cheap recycled IPs may be blocked or blacklisted. China all red + global green is a classic warning pattern before purchase.
- [Before You Buy a VPS: Verify Routes with Nationwide Carrier Maps and Spot Fake CN2 Claims (SpeedCE Playbook)](https://freejbgo.github.io/SpeedCE-English-Tech/articles/vps-line-verification-guide.html): In HostLoc threads, buyers say "my ping is 28ms" and sellers claim "three-carrier direct"—a week later Mobile users complain. Sample size is 1, and the sample …
- [VPS 7-Day Refund Acceptance Checklist: Screenshots, Three Carriers, Peak Evidence](https://freejbgo.github.io/SpeedCE-English-Tech/articles/vps-refund-period-checklist.html): Refunds need evidence: three-carrier screenshots + success rates + peak comparison—100× better than forum "feels slow."
- [VPS Before and After CDN: Map Comparison for CDN Go/No-Go Decisions](https://freejbgo.github.io/SpeedCE-English-Tech/articles/vps-with-cdn-comparison.html): Data beats opinions: same target with and without CDN on three-carrier maps—does latency and success improve enough to justify cost?
- [Vultr DC Route Acceptance: Picking Tokyo/Singapore/LA by Workload Maps](https://freejbgo.github.io/SpeedCE-English-Tech/articles/vultr-line-guide.html): Vultr has many regions—accept each candidate IP on China three-carrier maps before annual prepay.

### CDN

- [Alibaba Cloud CDN Acceptance: Origin, Certificate, Warmup, and Three-Carrier Checks](https://freejbgo.github.io/SpeedCE-English-Tech/articles/aliyun-cdn-acceptance.html): Aliyun CDN has many knobs—origin, HTTPS cert, cache rules. Three-carrier SpeedCE maps are the final acceptance gate.
- [AWS CloudFront China Access: Global Distribution vs Domestic Experience](https://freejbgo.github.io/SpeedCE-English-Tech/articles/aws-cloudfront-china.html): CloudFront global green doesn't promise China speed—accept with China nodes and consider China-specific CDN if needed.
- [Bunny CDN Value Routes: Global Node Map Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/bunny-cdn-guide.html): Budget CDN still needs per-country and China acceptance if you have that audience.
- [CDN Cache vs Active Probing: Why First Request Slow, Second Fast](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cdn-cache-vs-speed-test.html): Probes hit cold cache differently than users. Understand cache layer when interpreting first vs repeat SpeedCE results.
- [CDN Certificate vs Origin Certificate: Both Sides Must Be Green](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cdn-cert-vs-origin.html): Edge cert can be fine while origin TLS breaks backhaul—or reverse. Test CDN hostname and origin separately.
- [CDN Cutover 72-Hour Monitoring: Hour-by-Hour from T+0 to T+72](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cdn-cutover-72h.html): CDN switch isn't done at DNS flip. Hourly SpeedCE checkpoints for 72 hours catch stubborn provincial cache and node gaps.
- [CDN Deployment Playbook: Multi-Node Speed Test Acceptance Before, During, and After Cutover](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cdn-deployment-speed-test-guide.html): CDN enabled but some users can't open? The issue is usually not "is CDN on" but wrong acceptance method. Comparative testing—CDN hostname vs origin—is the gold…
- [CDN Origin Failure Complete Troubleshooting: Edge, Timeout, and Origin Comparison](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cdn-origin-failure.html): CDN red often traces to origin, not edge. Always pair CDN hostname map with origin IP map.
- [CDN WebSocket/Live Stream Reachability: Acceptance Boundaries](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cdn-websocket-stream.html): SpeedCE HTTPS probes don't equal WebSocket or RTMP health. Know tool boundaries; supplement with stream-specific checks.
- [Cloudflare Orange Cloud and China Access: Complete Acceptance Handbook](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cloudflare-china-access.html): Cloudflare on doesn't mean China is fast. Orange cloud changes path—accept with China node maps and origin comparison.
- [DCDN vs Standard CDN: Acceptance Standards and SpeedCE Comparative Method](https://freejbgo.github.io/SpeedCE-English-Tech/articles/dcdn-vs-cdn.html): Full-site acceleration vs static CDN—different failure modes. Accept each with comparative origin tests.
- [Edge Functions/Workers Failures: Main Domain Green but Rules Not Applied](https://freejbgo.github.io/SpeedCE-English-Tech/articles/edge-function-troubleshoot.html): Workers and edge rules fail independently of origin. Test both default route and rule-triggered paths.
- [Fastly CDN Acceptance: Edge Rules and Origin Comparative Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/fastly-cdn-guide.html): Fastly power users need edge rule validation plus origin comparison on every critical hostname.
- [Font CDN and Google Fonts: China Load Failure and Speed Test Division](https://freejbgo.github.io/SpeedCE-English-Tech/articles/font-cdn-google-china.html): fonts.googleapis.com blocked in China—SpeedCE confirms font domain reachability; fix with local mirror.
- [Is Free CDN Enough? Personal Site Decisions with Nationwide Map Data](https://freejbgo.github.io/SpeedCE-English-Tech/articles/free-cdn-enough.html): Free tiers have limits—nodes, HTTPS, China path. Use map data to decide if free CDN meets your audience or upgrade is mandatory.
- [Huawei Cloud / Baidu Cloud CDN Acceptance and Three-Carrier Map Standards](https://freejbgo.github.io/SpeedCE-English-Tech/articles/huawei-baidu-cdn-guide.html): Domestic cloud CDNs need same rigorous three-carrier acceptance as any vendor—console green isn't user green.
- [Image CDN with WebP/AVIF: Static Domain Nationwide Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/image-cdn-webp-avif.html): Modern image formats on separate img CDN—Mobile carriers especially need img domain maps.
- [Multi-CDN Trial Map Comparison: Scientific Vendor Selection on Same Domain](https://freejbgo.github.io/SpeedCE-English-Tech/articles/multi-cdn-comparison.html): Run parallel trials—same content, different CDN—compare three-carrier maps during trial window before annual contract.
- [Overseas CDN China Acceleration Pack: When Global Green but China Slow](https://freejbgo.github.io/SpeedCE-English-Tech/articles/overseas-cdn-china-pack.html): Global map green, China red on overseas CDN is common. Decide if China pack, domestic CDN, or separate .cn is needed.
- [Qiniu CDN Onboarding: Domestic Site Speed Acceptance Checklist](https://freejbgo.github.io/SpeedCE-English-Tech/articles/qiniu-cdn-guide.html): Qiniu is common for China static/video—three-carrier acceptance after bucket and domain bind.
- [Static Asset CDN Split Acceptance: Independent Speed Test for js/css Domains](https://freejbgo.github.io/SpeedCE-English-Tech/articles/static-cdn-split.html): js.example.com and www.example.com are separate DNS/CDN/certs. Test every public static domain on the checklist.
- [Tencent Cloud CDN Acceptance: Static vs Full-Site Acceleration and Speed Test Points](https://freejbgo.github.io/SpeedCE-English-Tech/articles/tencent-cdn-acceptance.html): Static CDN vs DCDN behave differently on acceptance. Map test each product mode against origin.
- [Upyun CDN Acceptance: Image Sites and Static Acceleration Map Standards](https://freejbgo.github.io/SpeedCE-English-Tech/articles/upyun-cdn-guide.html): Image-heavy sites on Upyun—test img domain separately from www on Mobile carriers.

### Global Expansion

- [Global API Rate Limits and Geo Blocks: Green Map but 403 Responses](https://freejbgo.github.io/SpeedCE-English-Tech/articles/api-rate-limit-global.html): Network reachability ≠ HTTP 200. Map green with 403 means app-layer geo or rate rules—know tool boundary.
- [App Store Review Period Servers: Overseas Review Node Reachability](https://freejbgo.github.io/SpeedCE-English-Tech/articles/app-store-review-server.html): Apple review runs from specific regions—probe API endpoints from US/EU nodes during review window.
- [Global Green, China Red: Standard Workflow for Blocking and Compliance Questions](https://freejbgo.github.io/SpeedCE-English-Tech/articles/china-blocked-overseas-ok.html): Overseas site working worldwide but not China may be GFW, ICP, or routing—not always "fix the server." Structured decision tree.
- [Cross-Border E-Commerce Speed Test Guide: Shopify/WooCommerce and Pre-Sale Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cross-border-ecommerce.html): Black Friday doesn't forgive slow checkout. Pre-sale map acceptance on payment and storefront domains in target countries.
- [Cross-Border Sale Prep: Black Friday/Christmas Speed Test Checklist](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cross-border-sale-prep.html): Holiday traffic spikes expose weak CDN and payment domains. T-7 to T+0 schedule with SpeedCE on all conversion paths.
- [Dual .cn and .com Strategy: Split Domain Speed Tests and Compliance Roles](https://freejbgo.github.io/SpeedCE-English-Tech/articles/dual-site-cn-com.html): .cn and .com often serve different audiences and compliance regimes—test and accept each domain independently.
- [EU/US Users Slow: Origin, CDN, and DC Location Triangle](https://freejbgo.github.io/SpeedCE-English-Tech/articles/europe-us-slow-fix.html): Fixing EU slowness isn't one knob—origin location, CDN PoPs, and database region interact. Map each leg.
- [Game Global Server Placement: Player Distribution vs Global PING Maps](https://freejbgo.github.io/SpeedCE-English-Tech/articles/game-server-global.html): Place shards where players are—overlay player geo data with SpeedCE global ping maps before launch.
- [GDPR and Cookie Walls: European User Access Network Baseline](https://freejbgo.github.io/SpeedCE-English-Tech/articles/gdpr-cookie-wall.html): Cookie consent walls don't affect TCP—but geo-blocked EU users show red maps; separate compliance vs network.
- [GeoDNS Verification: Speed Testing When Resolvers Return Different IPs by Region](https://freejbgo.github.io/SpeedCE-English-Tech/articles/geodns-verification.html): GeoDNS means Beijing and Berlin resolve differently—probe from multiple regions and compare resolved targets.
- [Global Website Launch Acceptance: Complete Checklist from China Nodes to Worldwide Probes](https://freejbgo.github.io/SpeedCE-English-Tech/articles/global-deployment-checklist.html): Your .com opens instantly in Shanghai; German customers see spinning wheels—the test perspective is wrong. Global launch needs probes in target markets; China …
- [Global Team Accessing China Admin: Dual-Map Collaboration and Acceleration Options](https://freejbgo.github.io/SpeedCE-English-Tech/articles/global-team-china-admin.html): Engineers abroad need China admin; China team needs global SaaS—dual maps expose both directions and guide acceleration SKU choice.
- [Latin America Node Acceptance: Brazil and Mexico Priority Map Standards](https://freejbgo.github.io/SpeedCE-English-Tech/articles/latin-america-nodes.html): LATAM latency varies hugely—accept São Paulo and Mexico City explicitly for regional products.
- [Middle East and Africa Node Acceptance: Emerging Market Map Targets](https://freejbgo.github.io/SpeedCE-English-Tech/articles/middle-east-africa-nodes.html): MEA growth markets need explicit probe targets—don't assume European CDN covers Lagos or Dubai well.
- [Multilingual Global Delivery: hreflang and Per-Locale Reachability Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/multilingual-site-delivery.html): Each locale path or subdomain may hit different CDN rules—accept every public locale URL from target regions.
- [Self-Hosted Notion-Like Tools: Global Team Access Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/notion-saas-availability.html): Self-hosted collaboration replaces Notion—accept from every employee region, not just HQ.
- [Overseas Live Streaming and Video Conference Node Selection: Latency-Sensitive Map Standards](https://freejbgo.github.io/SpeedCE-English-Tech/articles/overseas-live-streaming.html): Streaming needs low jitter to target viewers—map latency percentiles in viewer countries, not just average.
- [Global SaaS Launch Acceptance: Target Market Success Rate Playbook](https://freejbgo.github.io/SpeedCE-English-Tech/articles/saas-global-launch.html): Launch where customers are—not where your team is. Target-country nodes must hit ≥95% before marketing spend.
- [Shopify Store Global Reachability: Theme, Payment, and App Domain Layered Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/shopify-speedtest.html): Shopify stacks domains—storefront, checkout extensions, apps—probe each layer in buyer countries.
- [Southeast Asia Market Node Acceptance: SG/MY/TH/ID/PH per-Country Targets](https://freejbgo.github.io/SpeedCE-English-Tech/articles/southeast-asia-nodes.html): SEA isn't one market—accept per country with global nodes focused on each target, not just Singapore hub.
- [Global Payment Domain Checks: Payment Page and Callback URL Independent Probes](https://freejbgo.github.io/SpeedCE-English-Tech/articles/stripe-payment-domain-check.html): Stripe and payment pages live on separate domains—checkout can fail while marketing site is green. Test payment URLs per country.
- [WooCommerce Global Acceptance: Plugins, Payment Gateways, and Main Domain Checklist](https://freejbgo.github.io/SpeedCE-English-Tech/articles/woocommerce-global.html): Self-hosted WooCommerce multiplies domains—payment plugin callbacks need independent nationwide/global probes.

### Industry

- [Corporate Website SLA: Reporting Availability with Success Rate Data to Management](https://freejbgo.github.io/SpeedCE-English-Tech/articles/corporate-website-sla.html): Executives want numbers—not "seems fine." Monthly SpeedCE success rates by carrier become SLA evidence.
- [Discuz Share Links: Main Site vs Share Domain Layered Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/discuz-qzone-share.html): QQ/WeChat share previews hit share domains—test share.example.com apart from forum root.
- [Download Site Reachability vs Bandwidth: Probing vs Download Speed Division](https://freejbgo.github.io/SpeedCE-English-Tech/articles/download-site-bandwidth.html): SpeedCE proves reachability; large file throughput needs download tests. Both matter for mirror sites.
- [E-Commerce 618/Double-11 Prep: Multi-Node Speed Test Battle Plan](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ecommerce-sale-prep.html): Domestic mega-sales need three-carrier maps on storefront, API, payment, and static domains—T-7 through T+0.
- [Fintech/Medical Website Network Baseline: HTTPS, Certificates, and Multi-Site Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/fintech-medical-compliance.html): Regulated industries need auditable network baselines—HTTPS success, cert validity, and DR site maps on record.
- [Forum Community Nationwide Reachability: Discuz/Flarum Three-Carrier Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/forum-community-site.html): Forums spike on controversy and events—baseline three-carrier acceptance prevents "only my province can't post" crises.
- [Private Game Server Community: Building Trust with Nationwide PING Maps](https://freejbgo.github.io/SpeedCE-English-Tech/articles/game-private-server-ping.html): Player trust grows when admins post SpeedCE ping maps—not verbal "low ping." Transparency reduces churn accusations.
- [Ghost Blog Deploy: Headless and Theme Domain Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ghost-blog-deploy.html): Ghost admin vs public theme may differ—accept both public URLs on HTTPS.
- [Government/Public Sector Sites: Nationwide Availability and IPv6 Dual-Stack Standards](https://freejbgo.github.io/SpeedCE-English-Tech/articles/government-site-standard.html): Public sites face stricter availability and IPv6 mandates—documented three-carrier and dual-stack acceptance.
- [Hexo/Hugo Static Site Launch: GitHub Pages vs Self-Hosted Map Comparison](https://freejbgo.github.io/SpeedCE-English-Tech/articles/hexo-hugo-static-site.html): Static generators still need HTTPS and CDN acceptance—compare GitHub Pages vs own VPS/CDN on China if relevant.
- [Hospital Appointment System Network Baseline: Peak and Mobile User Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/hospital-appointment-system.html): Healthcare portals must work on Mobile for elderly users—strict three-carrier acceptance and peak drill.
- [Spring Boot API Nationwide Acceptance: Gateway, Certificates, and Subdomain List](https://freejbgo.github.io/SpeedCE-English-Tech/articles/java-spring-boot-api.html): Java microservices multiply public hosts—gateway, auth, API each need probe checklist.
- [Laravel/PHP Site Launch: FPM, Nginx, and Nationwide HTTPS Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/laravel-php-deploy.html): PHP-FPM pool misconfig shows as intermittent 502 with partially green maps—network first, then FPM.
- [Mini Program Backend API Nationwide Acceptance: Legal Domain, ICP, and Mobile Network](https://freejbgo.github.io/SpeedCE-English-Tech/articles/miniprogram-backend-api.html): WeChat mini programs require reachable APIs on allowed domains—Mobile network acceptance is non-negotiable in China.
- [Mobile App API Domain Monitoring: iOS/Android Mismatch Network Troubleshooting](https://freejbgo.github.io/SpeedCE-English-Tech/articles/mobile-app-api-domain.html): When iOS and Android users disagree, compare API domain maps on Mobile vs Telecom and check DNS split.
- [News Media Peak Traffic: Nationwide Checkpoint SOP Before Breaking Stories](https://freejbgo.github.io/SpeedCE-English-Tech/articles/news-media-peak-traffic.html): Viral articles spike in minutes—pre-publish SpeedCE checkpoint on origin and CDN prevents national embarrassment.
- [Next.js/Nuxt SSR Deploy Acceptance: Node Service and CDN Layered Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/nextjs-nuxt-ssr-deploy.html): SSR adds origin compute layer—accept Node directly and through CDN with separate maps.
- [Online Education Platform Pre-Class Acceptance: Video, Live, and API Domains](https://freejbgo.github.io/SpeedCE-English-Tech/articles/online-education-platform.html): Class start failures damage refunds and reputation—accept video CDN, live push/pull, and API on three carriers before semester.
- [Personal Blog Launch Acceptance: Hexo/Hugo/WordPress Universal Speed Checklist](https://freejbgo.github.io/SpeedCE-English-Tech/articles/personal-blog-launch.html): Even small blogs deserve nationwide HTTPS acceptance before you share the link—especially on Mobile carriers.
- [Django/Flask Deploy Speed Tests: WSGI and Application Layer Division](https://freejbgo.github.io/SpeedCE-English-Tech/articles/python-django-flask.html): Gunicorn/uwsgi behind Nginx—accept public URL, not just manage.py runserver on localhost.
- [Recruitment Site Peak Acceptance: Pre-Campus-Season Nationwide Checkpoint](https://freejbgo.github.io/SpeedCE-English-Tech/articles/recruitment-careers-site.html): Campus hiring spikes mobile traffic on careers pages—accept before September rush.
- [B2B SaaS Demo Environment: Map Acceptance in Prospect Regions](https://freejbgo.github.io/SpeedCE-English-Tech/articles/saas-b2b-demo-environment.html): Demo URLs that fail in prospect's province kill deals—probe demo domains from their country/region before calls.
- [Typecho/Emlog Lightweight Blogs: Small Sites Still Need Nationwide Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/typecho-emlog-blog.html): Lightweight doesn't mean skip probes—personal blogs go viral too; Mobile acceptance matters.
- [VOD Site Acceptance: Playback Domain, CDN, and API Three-Domain Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/video-on-demand-site.html): Video sites fail on CDN play domain while www is fine—three-domain acceptance standard.
- [WordPress Troubleshooting: White Screen, 502, and Plugin Conflicts—Network Layer First](https://freejbgo.github.io/SpeedCE-English-Tech/articles/wordpress-troubleshooting.html): WP issues masquerade as network faults. SpeedCE green means shift to PHP/plugins; red means fix infra first.

### Methodology

- [A/B Comparative Speed Testing: CDN vs Origin, Before/After Migration, Competitors](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ab-comparison-method.html): Single-target tests lie; pairs reveal truth. Systematic A/B methodology for every major infra decision.
- [Calendar Reminder Inspections: Embed Speed Tests in Google Calendar/Feishu](https://freejbgo.github.io/SpeedCE-English-Tech/articles/calendar-reminder-inspect.html): Recurring calendar events with SpeedCE checklist link—ops hygiene via reminders.
- [Customer Support Speed Test Scripts: 20+ Professional Replies for "Can't Open"](https://freejbgo.github.io/SpeedCE-English-Tech/articles/customer-support-scripts.html): Stop saying "works for me." Copy-paste scripts with map data, scope, and next steps for support teams.
- [2026 Free Speed Test Tool Decision Tree: SpeedCE/ITDOG/BOCE by Scenario](https://freejbgo.github.io/SpeedCE-English-Tech/articles/free-speedtest-tools-2026.html): No single free tool does everything—pick by scenario with this decision tree.
- [How to Read Speed Test Maps: Green/Red/Gray, Latency, and Success Rate Explained](https://freejbgo.github.io/SpeedCE-English-Tech/articles/how-to-read-speed-map.html): Maps intimidate newcomers—this guide decodes every color and metric so one screenshot tells a story.
- [Speed Test Data in Incident Reports: Professional Postmortem Writing Templates](https://freejbgo.github.io/SpeedCE-English-Tech/articles/incident-report-speed-data.html): Postmortems without probe timestamps and maps look amateur—templates for timeline + geographic impact.
- [Monthly Website Inspection SOP: 15 Minutes Personal, 1 Hour Enterprise](https://freejbgo.github.io/SpeedCE-English-Tech/articles/monthly-inspection-sop.html): Monthly rhythm catches drift before users do—scaled SOP for personal blogs vs enterprise properties.
- [On-Call First 5 Minutes: How to Run SpeedCE After an Alert](https://freejbgo.github.io/SpeedCE-English-Tech/articles/on-call-first-5-minutes.html): Alert fires—first five minutes set incident trajectory. SpeedCE protocol for on-call before deeper dives.
- [On-Call Runbook Speed Test Chapter: 5-Minute SOP After Alerts](https://freejbgo.github.io/SpeedCE-English-Tech/articles/oncall-runbook-speedtest.html): Embed SpeedCE steps directly in runbook—protocol, scope, screenshot filename, escalation triggers.
- [Blameless Postmortem Speed Evidence: Timelines and Maps in Writeups](https://freejbgo.github.io/SpeedCE-English-Tech/articles/postmortem-blameless.html): Great postmortems include probe timestamps and geographic impact maps—not just "DNS issue."
- [Pre-Launch 30-Item Checklist: Including 8 Mandatory Multi-Node Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/pre-launch-30-checklist.html): Launch gates prevent Friday night disasters—eight SpeedCE items among thirty before go-live.
- [SpeedCE Tool Selection Guide: HTTP, HTTPS, PING, TCPing, DNS & Traceroute](https://freejbgo.github.io/SpeedCE-English-Tech/articles/protocol-selection-guide.html): SpeedCE's tool dropdown now bundles six probes. Wrong tool wastes incident hours—this guide maps each scenario to the right pick.
- [Quarterly Infrastructure Review: Map Trends, Degradation, and Upgrade Decisions](https://freejbgo.github.io/SpeedCE-English-Tech/articles/quarterly-infra-review.html): Quarterly side-by-side maps reveal slow degradation—upgrade CDN or routes before success rate cliff.
- [Regex Subdomain Discovery: Automation Ideas for Missing Domain Inventory](https://freejbgo.github.io/SpeedCE-English-Tech/articles/regex-domain-inventory.html): Cert transparency and DNS logs help find forgotten hosts—then SpeedCE monthly inventory.
- [Speed Test Screenshot Archive SOP: Standards for Tickets, Forums, and Incident Reports](https://freejbgo.github.io/SpeedCE-English-Tech/articles/screenshot-archive-sop.html): Screenshots without metadata are useless. Filename, time, protocol, target—archive SOP for defensible evidence.
- [Monthly SLA Report Template: Success Rate Data for Management](https://freejbgo.github.io/SpeedCE-English-Tech/articles/sla-report-monthly.html): Turn SpeedCE monthly archives into executive SLA slides—formula and template included.
- [SpeedCE + BOCE Collaboration: Compliance and Blocking After Network Layer Cleared](https://freejbgo.github.io/SpeedCE-English-Tech/articles/speedce-boce-combo.html): Network green but WeChat won't open—BOCE for blocking/ICP after SpeedCE clears reachability.
- [SpeedCE + ITDOG Golden Combo: Map Patrol and Continuous Ping Collaboration](https://freejbgo.github.io/SpeedCE-English-Tech/articles/speedce-itdog-combo.html): SpeedCE for geographic picture; ITDOG for continuous ping curves—pair for intermittent and regional issues.
- [Network Probing vs PageSpeed: Reachability vs Performance Decision Order](https://freejbgo.github.io/SpeedCE-English-Tech/articles/speedtest-vs-pagespeed.html): Page can score 100 yet be unreachable in Xinjiang. Test reachability first, performance second.
- [Active Probes vs 24/7 Monitoring: SpeedCE's Place in Ops Stack](https://freejbgo.github.io/SpeedCE-English-Tech/articles/speedtest-vs-uptime.html): Probes are snapshots; monitoring is history—both needed, different jobs. Where SpeedCE fits in on-call.
- [New Ops Hire Day One: SpeedCE and Toolchain Training Handbook](https://freejbgo.github.io/SpeedCE-English-Tech/articles/team-onboarding-speedce.html): Onboarding checklist—SpeedCE first, then ITDOG, BOCE, monitoring, and change gates.
- [Three-Carrier Split Testing Complete Guide: Why Telecom, Unicom, Mobile Must Be Separate](https://freejbgo.github.io/SpeedCE-English-Tech/articles/tri-network-method.html): Averaging three carriers hides Mobile disasters. Split maps are mandatory for China audience acceptance.
- [Cloud/CDN Vendor Tickets: Screenshot Standards and Description Templates](https://freejbgo.github.io/SpeedCE-English-Tech/articles/vendor-ticket-evidence.html): Vendors ignore vague tickets—attach three-carrier maps with UTC time, target, protocol, success rate.

### Comparison

- [17CE vs SpeedCE: Legacy Table Tool vs Modern Map Tool in Practice](https://freejbgo.github.io/SpeedCE-English-Tech/articles/17ce-vs-speedce.html): 17CE veterans vs SpeedCE maps—feature overlap, gaps, and migration tips for daily patrol.
- [Alibaba Cloud Synthetic Monitoring vs SpeedCE: How Aliyun Users Pair Both](https://freejbgo.github.io/SpeedCE-English-Tech/articles/aliyun-boce-vs-speedce.html): Same-cloud synthetic probes vs independent SpeedCE maps—complementary acceptance for Aliyun-hosted sites.
- [CESU.ai vs SpeedCE: Emerging Tool Site vs Map-First Probe Comparison](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cesu-vs-speedce.html): New tools appear yearly—compare CESU.ai features against SpeedCE map workflow for daily patrol.
- [Chinaz Toolkit Ecosystem vs SpeedCE: Ping/Speed/Whois Division of Labor](https://freejbgo.github.io/SpeedCE-English-Tech/articles/chinaz-toolkit-review.html): Chinaz offers many utilities—when to use which vs SpeedCE geographic HTTPS maps.
- [Developer 2026 Bookmark Bar: 12 Links for 90% of Network Incidents](https://freejbgo.github.io/SpeedCE-English-Tech/articles/developer-bookmark-list.html): Curated bookmark bar—SpeedCE first, then ITDOG, BOCE, PageSpeed, and status pages.
- [GTmetrix vs SpeedCE: Performance Testing vs Network Probing Division](https://freejbgo.github.io/SpeedCE-English-Tech/articles/gtmetrix-vs-speedce.html): GTmetrix waterfall vs geographic reachability—orthogonal; run both before launch.
- [Map vs Table Speed Tools: Troubleshooting Efficiency Compared](https://freejbgo.github.io/SpeedCE-English-Tech/articles/map-vs-table-tools.html): Tables excel at numbers; maps excel at geography—for regional faults, maps win minutes to resolution.
- [Monitoring Platforms vs Probe Tools: 24/7 Alerts and First Response](https://freejbgo.github.io/SpeedCE-English-Tech/articles/monitoring-vs-probing.html): PagerDuty tells you something broke; SpeedCE tells you where—integrate both in runbooks.
- [PageSpeed Insights vs Network Probing: Division Site Owners Must Understand](https://freejbgo.github.io/SpeedCE-English-Tech/articles/pagespeed-vs-network.html): Lighthouse scores don't replace "can users in Gansu open it?"—orthogonal metrics, both required.
- [Ping.pe Complete Guide: Complementary Global/China Strategy with SpeedCE](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ping-pe-use-cases.html): Ping.pe for quick global ping matrix; SpeedCE for China carrier maps—complementary not redundant.
- [SpeedCE vs BOCE Complete Comparison: Lightweight Maps vs Full Ops Toolkit](https://freejbgo.github.io/SpeedCE-English-Tech/articles/speedce-vs-boce.html): BOCE does more than reachability; SpeedCE focuses on geographic HTTPS maps—know the boundary.
- [SpeedCE vs ITDOG Complete Comparison: Scenarios, Pros/Cons, and Pairing](https://freejbgo.github.io/SpeedCE-English-Tech/articles/speedce-vs-itdog.html): Map-first vs table/ping-first—when to open which tab and how to combine without duplicate work.
- [2026 Top 5 Free Speed Test Tools for Site Owners: Deep Review and Bookmark Picks](https://freejbgo.github.io/SpeedCE-English-Tech/articles/top5-free-speedtest-2026.html): Curated stack for solo site owners—what to bookmark and when to use each in 2026.
- [VSPING vs SpeedCE: Pollution Detection and Reachability Together](https://freejbgo.github.io/SpeedCE-English-Tech/articles/vsping-vs-speedce.html): VSPING for pollution/GFW signals; SpeedCE for nationwide HTTPS maps—use in sequence.
- [WebPageTest vs SpeedCE: When to Use Which Tool](https://freejbgo.github.io/SpeedCE-English-Tech/articles/webpagetest-vs-speedce.html): Filmstrip debugging vs China carrier maps—pick tool by question type.

### Advanced

- [A/B Test Traffic Split Domains: Independent Map Acceptance per Experiment Arm](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ab-test-traffic-split.html): Experiment subdomain must accept independently—don't assume control map applies to variant.
- [Acquisition Tech Due Diligence: Quick Nationwide Reachability Assessment](https://freejbgo.github.io/SpeedCE-English-Tech/articles/acquisition-due-diligence.html): M&A technical DD—SpeedCE snapshot of target's main domains in 30 minutes.
- [Affiliate Tracking Domains: Nationwide Reachability Impact on Conversion Chain](https://freejbgo.github.io/SpeedCE-English-Tech/articles/affiliate-tracking-domain.html): Affiliate click blocked in one province loses commission—probe tracking domains on three carriers.
- [News Release Peak Traffic: 30-Minute Pre-Publish Checkpoint](https://freejbgo.github.io/SpeedCE-English-Tech/articles/cctv-news-peak.html): State media and viral news—half-hour SpeedCE gate before publish button.
- [Change Management Speed Test Gate: Mandatory Probe After DNS/Cert/Nginx Changes](https://freejbgo.github.io/SpeedCE-English-Tech/articles/change-management-speedtest.html): Institutionalize "no SpeedCE screenshot, no change close"—reduces rollback incidents.
- [Quarterly Client Reports with Maps: B2B Provider Speed Test Reporting Template](https://freejbgo.github.io/SpeedCE-English-Tech/articles/client-report-quarterly.html): Agencies retain clients with quarterly map reports—white-label template structure.
- [Competitor Benchmark Speed Tests: Same-Niche Map Comparison to Convince Leadership](https://freejbgo.github.io/SpeedCE-English-Tech/articles/competitor-benchmark.html): Leadership ignores latency complaints until competitor map is all green and yours isn't—data-driven upgrade requests.
- [Disaster Recovery Drill: Nationwide SpeedCE Checkpoint After DR Failover](https://freejbgo.github.io/SpeedCE-English-Tech/articles/disaster-recovery-drill.html): DR drill isn't done until DR site maps match primary acceptance thresholds.
- [Double-11/618 Sale Speed Test Timeline: T-7 to T+0 Complete Rhythm](https://freejbgo.github.io/SpeedCE-English-Tech/articles/double11-618-prep.html): Domestic mega-sales timeline with SpeedCE gates at T-7, T-3, T-1, and hourly T+0.
- [Guangdong/Zhejiang/Shanghai/Beijing Baseline Latency: Map Targets for Coastal Economies](https://freejbgo.github.io/SpeedCE-English-Tech/articles/guangdong-zhejiang-baseline.html): Coastal economic hubs expect lower latency—use as baseline when accepting CDN and origin upgrades.
- [Hainan Free Trade Zone Sites: Island Geography and Access Traits](https://freejbgo.github.io/SpeedCE-English-Tech/articles/hainan-special-zone.html): Island province routing differs from mainland—dedicated map acceptance for Hainan-focused services.
- [Post-ICP Filing Nationwide Reachability Acceptance: DNS, Certs, and Compliance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/icp-filing-launch-check.html): ICP approved doesn't mean nationwide green—accept parsing, HTTPS, and compliance probes after filing goes live.
- [Inner Mongolia/Northeast: Cold-Region Routes and Winter Peak Traffic](https://freejbgo.github.io/SpeedCE-English-Tech/articles/inner-mongolia-northeast.html): Winter heating season shifts traffic patterns—retest northeast maps in January peak.
- [Ad Landing Pages: 10-Minute Nationwide Checkpoint Before Campaign Launch](https://freejbgo.github.io/SpeedCE-English-Tech/articles/landing-page-campaign.html): Paid traffic to slow landing pages burns budget—SpeedCE gate before ad account goes live.
- [Migration Before/After Report Template: Dual-Map Slides for Executives and Clients](https://freejbgo.github.io/SpeedCE-English-Tech/articles/migration-before-after-report.html): Side-by-side maps in PPT close migration projects professionally—template structure included.
- [Ops Handover Speed Baselines: Map Archive Required Before Departure](https://freejbgo.github.io/SpeedCE-English-Tech/articles/multi-team-handover.html): Leaving ops without baseline maps strands the team—handover package template.
- [National Holiday Golden Week: Pre-Surge Mobile User Checkpoint](https://freejbgo.github.io/SpeedCE-English-Tech/articles/national-holiday-golden-week.html): Golden week mobile travel surge—three-carrier checkpoint one week before holiday.
- [New Domain Cold Start 72 Hours: Registration, DNS, Certs, and Map Acceptance Rhythm](https://freejbgo.github.io/SpeedCE-English-Tech/articles/new-domain-cold-start.html): New domains propagate unevenly—72-hour SpeedCE rhythm from registration through first marketing push.
- [Northeast China Access Quality: Cold-Region Routes and CDN Node Coverage](https://freejbgo.github.io/SpeedCE-English-Tech/articles/northeast-china-access-guide.html): Heilongjiang/Jilin/Liaoning have unique long-haul paths—accept with regional map focus.
- [Pre-Pentest External Attack Surface: Public Domain Speed Test Inventory](https://freejbgo.github.io/SpeedCE-English-Tech/articles/penetration-test-prep.html): Before pentest, inventory all public hosts with probes—find orphan domains attackers will too.
- [Fujian/Guangdong Taiwan-Trade Sites: Southeast Coastal Map Acceptance](https://freejbgo.github.io/SpeedCE-English-Tech/articles/province-fujian-taiwan-trade.html): Cross-strait trade sites need coastal map baselines and Mobile emphasis.
- [Henan/Hubei Central China Access Optimization: Map Patterns and CDN Strategy](https://freejbgo.github.io/SpeedCE-English-Tech/articles/province-henan-hubei.html): Central provinces bridge north-south routes—recognize map signatures and CDN node placement.
- [Beijing-Tianjin-Hebei/Shandong Baseline: North China Map Targets](https://freejbgo.github.io/SpeedCE-English-Tech/articles/province-shandong-hebei.html): North China dense population—use as reference baseline for CDN PoP effectiveness.
- [Sichuan/Chongqing Access Acceptance: Southwest Nodes and Route Traits](https://freejbgo.github.io/SpeedCE-English-Tech/articles/province-sichuan-chongqing.html): Southwest basin geography affects routes—accept with province-focused maps.
- [Yunnan/Guizhou Access: Southwest Frontier Maps and Mobile Network](https://freejbgo.github.io/SpeedCE-English-Tech/articles/province-yunnan-guizhou.html): Southwest frontier provinces often show higher latency—set realistic targets and CDN strategy.
- [September School Season: Education Site Traffic Assurance Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/school-start-september.html): September enrollment spikes—education platforms run T-14 SpeedCE schedule.
- [Baidu/Google Crawlers and Site Reachability: SEO Angle on Speed Tests](https://freejbgo.github.io/SpeedCE-English-Tech/articles/seo-crawl-baidu-google.html): Crawlers hit from specific networks—reachability supports SEO; SpeedCE complements Search Console.
- [Short Link Domain Acceptance: Nationwide Node Tests on Redirect Chains](https://freejbgo.github.io/SpeedCE-English-Tech/articles/short-link-domain-check.html): t.co style short domains redirect—probe short URL and final landing separately.
- [Spring Festival Traffic Assurance: Three-Carrier Checkpoint Before Mobile Surge](https://freejbgo.github.io/SpeedCE-English-Tech/articles/spring-festival-traffic.html): Holiday mobile usage spikes—pre-festival three-carrier maps on all conversion domains.
- [Status Page Setup: How Probe Data Supports Public Status Pages](https://freejbgo.github.io/SpeedCE-English-Tech/articles/status-page-setup.html): Status pages need honest geographic impact—integrate probe summaries subscribers understand.
- [Subdomain Inventory Patrol: One Spreadsheet for Monthly Speed Tests of All Public Domains](https://freejbgo.github.io/SpeedCE-English-Tech/articles/subdomain-inventory-method.html): Forgotten api-staging.example.com causes incidents—inventory method ensures no public host skips monthly probe.
- [2026 Ultimate Site Owner Browser Toolbar: Speed, Monitor, Performance 12 Links](https://freejbgo.github.io/SpeedCE-English-Tech/articles/ultimate-toolbar-2026.html): One toolbar row for daily ops—SpeedCE, uptime, PageSpeed, DNS, SSL expiry, and vendor consoles.
- [Xinjiang/Tibet/Northwest Access Optimization: Map Acceptance and CDN Strategy](https://freejbgo.github.io/SpeedCE-English-Tech/articles/xinjiang-tibet-access-guide.html): Northwest provinces show distinct map patterns—don't treat as generic "China slow"; targeted CDN and DNS strategy.
- [Year-End Infrastructure Report: Summarizing 12 Months of Map Archives](https://freejbgo.github.io/SpeedCE-English-Tech/articles/year-end-summary-report.html): December is time to aggregate monthly screenshots into annual availability narrative.
- [Zero-Downtime Deploy: Blue/Green and Canary Map Comparison](https://freejbgo.github.io/SpeedCE-English-Tech/articles/zero-downtime-deploy.html): Canary slice still needs geographic probe on canary hostname—compare blue vs green maps.

## Optional

- [Full index llms-full.txt](https://freejbgo.github.io/SpeedCE-English-Tech/llms-full.txt): GitHub and Raw links