I visit China every couple of years. I used to work remotely while I was there, but these days I’ve given up on the idea. It used to be easy, just ssh tunnel to a friendly server and you’re all set. Now they block every technique I can come up with and fuck up the entire connection if you make a wrong move. There are specialist VPN services that still work, but it’s a real pain to figure out which ones work and which ones used to work and are now broken, and you can’t count on anything continuing to work.