Cloudflare China – How to Make It Work (or Replace It) with 21YunBox

Learn why Cloudflare alone falls short inside the Great Firewall and how 21YunBox Optimizer can partner with—‑or replace—‑Cloudflare to deliver lightning‑fast, compliant experiences to every visitor in Mainland China.

Need a Cloudflare China Boost? Get a Free Speed Test.

Our fully managed overlay adds China speed and compliance to your existing Cloudflare setup—no rebuilds, no extra DevOps.

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Let us handle China so you can focus on growth.

Global traffic path via Cloudflare vs. direct 21YunBox Optimizer route inside Mainland China

Cloudflare in China: Why It’s Not Enough by Itself

Cloudflare’s global edge network is phenomenal—until your traffic crosses into Mainland China. Inside the Great Firewall, Cloudflare must rely on a separate partnership network (run by JD Cloud) and you must already hold an ICP licence. The result? Static files cache, but third‑party scripts, APIs, and key assets (Google Fonts, YouTube, Salesforce forms…) still time‑out or get blocked, and compliance headaches remain yours alone.

Bottom line: Cloudflare China Network = speed boost for your own domain, but no help for blocked resources or legal filings.

Meet 21YunBox Optimizer

21YunBox Optimizer is a managed overlay that rewrites, hosts, and accelerates everything your site or app depends on—while we handle ICP filing, PSB police filing, and continuous content audits for you. Think of it as a “China compatibility layer” that snaps onto any stack in a single CNAME.

	Cloudflare China Accelerator	21YunBox Optimizer
What you get	Extra Cloudflare PoPs inside China	Full overlay that rewrites & re‑hosts your site
ICP licence	You must bring it	21YunBox can file it for you
Blocked resources (YouTube, Google Fonts…)	Still blocked—no auto fix	Auto‑mirrored to China‑safe versions
Dynamic APIs	Routed, but not rewritten	Rewritten & proxied < 80 ms
Video	Just cached if allowed	Ingested, transcoded, streamed onshore
Who manages	Your team	Fully managed by 21YunBox

Your Two Winning Architectures

Option A: 21YunBox Optimizer only for China. Option B: 21YunBox in front of Cloudflare for China visitors.

Scenario	Traffic Path (China Visitors)	When to Choose	Key Benefits
A. Optimizer‑only	Visitor → 21YB PoP → Origin	One vendor owns speed & compliance	Fastest TTFB; blocked assets fixed; 21YB handles ICP
B. Optimizer + Cloudflare	Visitor → 21YB PoP → Cloudflare → Origin	You already use Cloudflare globally	Keep existing Cloudflare WAF/Workers; Optimizer fixes China pain with zero code change

Why Put 21YunBox Before Cloudflare in China?

The heavy lifting (asset rewrite, video transcode, ICP) must happen inside China. A second hop to Cloudflare’s JD‑Cloud edge adds latency but no extra value.
One CNAME cut‑over (cn.yoursite.com) gives you instant separation: Optimizer handles Mainland IPs, Cloudflare handles everyone else.

What Gets Fixed Automatically with Optimizer

Blocked third‑party scripts → swapped for China‑safe mirrors
Slow APIs → rewritten & proxied over our private backbone (<80 ms RTT)
Streaming & video embeds → ingested, transcoded, and served via multi‑CDN mesh
Google Fonts / reCAPTCHA / Stripe.js → local mirrors delivered in‑country
Compliance → ICP licence, PSB filing, six‑month log retention—all done for you

Real‑World Gains

Metric	Cloudflare China Only	21YB Optimizer	Delta
Page TTFB	800–1 200 ms	<100 ms	×10 faster
API Latency	600–900 ms	<80 ms	×7–10 faster
Video First Frame	5–15 s buffer	<2 s	Viewers stay engaged
Compliance Workload	You own it	Done‑for‑you	Save months