[ehhthing]

UU Booster, which is the service I currently use for gaming is operated by NetEase, which is a giant in the Chinese online gaming space. It's fully legal, no issues whatsoever.

Also you can get roaming SIM cards or even eSIMs, which connect to APNs overseas.

You can also get Alibaba Cloud private networking connection between a region inside of China and a region outside. They use private lines so there's no GFW involved. My understanding is that you need an international real name verified account to do this, but after that you basically have an uncensored line that's also much more stable than connections that have to go through the GFW. I know of a US company that uses this to connect their Chinese workers to their central office, and again it's fully legal once you get an ICP license.