Originally Posted by u-Bob

What I would do is:
Ask your host to run sshd on port 443 on one of your servers.
When in china, use putty to connect to port 443 on your server (If you are forced to use a proxy by some local Chinese isp, it probably won't block the connection since you are using the same port webservers normally use for SSL connections... putty can tunnel through proxies using the CONNECT method.) and create a tunnel.