Forget about all other comments here suggesting a particular VPN service. Trust me, this is the way to go. I go to China for work multiple times a year. Not only will you suffer with sporadic speeds, latency, dropped connections and you’ll need to pre-download clients or configuration files before you enter China in some cases (Astrill). Stop looking further, Streisand gives you options for your own private VPN. Delete the server once you’re out of there.
Streisand is a godsent when you need VPN and you don’t know which ones are not blocked without going to dozens of shady forums.
Also, it’s obvious but do not discuss politics in China with your friends or coworkers. Enjoy food that normal middle class eats at extremely crowded high turnover lunch places. You won’t get sick and the food is going to be amazing. Don’t have anything that is “free”. It’s a trap.