If your users are in mainland China, the route between your server and China matters more than CPU or disk speed. A server just a few milliseconds away in Hong Kong can still feel slow if its traffic enters China over congested links. That’s what CN2 routing solves.

Why China routes are different

International traffic into mainland China passes through a limited number of gateways operated by China’s carriers (China Telecom, China Unicom, China Mobile). The standard China Telecom backbone for international traffic (ChinaNet, AS4134, often called “163”) is heavily used. In the evening peak in China, it commonly shows:

  • High latency spikes,
  • Packet loss of several percent or more,
  • Slow, unstable downloads.

The physical distance from Hong Kong is tiny; the congestion is the problem.

What CN2 is

CN2 (ChinaNet Next Carrying Network, AS4809) is China Telecom’s premium backbone, designed for business and international traffic. It’s less congested and has better quality of service. It comes in two main forms:

CN2 GT CN2 GIA
Full name Global Transit Global Internet Access
Path Uses CN2 internationally, but often mixes with the 163 backbone inside China CN2 end to end
Quality at peak Better than standard routes Best and most stable
Cost Moderate Highest

Premium bandwidth costs carriers and providers much more than ordinary transit, which is why China-optimized plans are usually sold by port speed (Mbps) rather than large monthly terabyte allowances.

Where BGP comes in

BGP (Border Gateway Protocol) is how networks announce routes to each other. A BGP multi-homed network connects to several upstream carriers and chooses good paths automatically. In “CN2 + BGP” setups:

  • Traffic to China Telecom users goes over CN2.
  • Traffic to China Unicom, China Mobile and the rest of the world uses other BGP upstreams that peer well with those networks.

The result is good routing for users on any Chinese carrier and for international visitors.

What this means in practice

For a website or application with users in mainland China, a Hong Kong VPS with CN2 + BGP usually gives:

  • Low, stable latency (often in the tens of milliseconds to southern China),
  • Much less packet loss at peak hours,
  • Better throughput for page loads, APIs and downloads.

There’s another benefit: ICP filing (备案) is only required for servers inside mainland China. A Hong Kong server can serve Chinese visitors without it.

How to test a route before buying

Don’t rely on marketing — test from where your users are (or ask a user there to test):

# Latency and loss
ping -c 50 TEST_IP

# Route and per-hop loss (Linux/macOS)
mtr -rwc 100 TEST_IP

On Windows, use tracert TEST_IP or WinMTR.

In the trace, look for hops in 59.43.x.x — that’s the CN2 network. Hops in 202.97.x.x indicate the standard 163 backbone. Test at peak time in China (roughly 20:00–23:00 Beijing time) — that’s when the difference shows.

Our Hong Kong VPS page lists test IPs you can use.

Hong Kong vs other locations for China

  • Hong Kong — closest major hub, the usual first choice for China traffic.
  • Tokyo — slightly higher latency; good when you also serve Japan and the wider Asia-Pacific. Our Japan VPS routes China traffic over CN2 GIA.
  • US West Coast — much higher latency; fine for global content but not ideal for China-first projects. See USA vs Hong Kong VPS.

Get more out of the route

  • Enable BBR congestion control on Linux for better throughput on lossy, long-distance paths.
  • Compress responses and optimize images — premium bandwidth is limited by port speed.
  • Avoid loading resources from services blocked in China (some Google fonts, analytics and CDNs); self-host assets instead.

Related: Singapore vs Hong Kong VPS for Southeast Asia and VPS bandwidth explained.

  • Hong Kong VPS
  • CN2
  • Networking
  • China