1)The great firewall: None of the Google products would work. This means no access to important stuff like Google Docs, Gmail, etc.
https://github.com/StreisandEffect/streisand installs Shadowsocks, which seems to work quite well in China, provided you find a VPS with good peering in mainland China. I hear a lot of people have good results with Vultr via Japanese data centers, other VPS providers in Hong Kong get good results too.
One of the maintainers of the project does live in China; if you have a question open up an issue in the discussions repo (https://github.com/StreisandEffect/discussions), I'm sure you'll get answers to whatever question you may have.