If anyone else wants to check their website's accessibility from China, I run a service that lets developers proxy HTTP requests through real Chinese (and worldwide) residential ISP customers: https://packetstream.io
We have a worldwide network of real users that install a relay app on win/mac and we proxy customer requests through their home ISP connections like this:
```
developer@Developers-MacBook-Pro-2:~% curl -x http://xxxx:xxxx_country-China@proxy.packetstream.io:31112 https://ifconfig.co/json
{"ip":"223.166.106.16","ip_decimal":3752225296,"country":"China","country_eu":false,"country_iso":"CN","city":"Qingpu","latitude":31.1539,"longitude":121.1141,"asn":"AS17621","asn_org":"China Unicom Shanghai network"}
```
```
developer@Developers-MacBook-Pro-2:~% curl -v -x https://xxxx:xxxx_country-China@proxy.packetstream.io:31111 https://news.ycombinator.com/
* Trying 34.234.216.249...
* TCP_NODELAY set
* Connected to proxy.packetstream.io (34.234.216.249) port 31112 (#0)
* Establish HTTP proxy tunnel to news.ycombinator.com:443
* Proxy auth using Basic with user 'xxxx'
> CONNECT news.ycombinator.com:443 HTTP/1.1
> Host: news.ycombinator.com:443
> Proxy-Authorization: Basic xxxx
> User-Agent: curl/7.54.0
> Proxy-Connection: Keep-Alive
>
< HTTP/1.1 502 Proxy Error (destination unreachable)
< Proxy-agent: PacketStream Proxy
< Content-Type: text/html
<
* Received HTTP code 502 from proxy after CONNECT
* Closing connection 0
curl: (56) Received HTTP code 502 from proxy after CONNECT
```