It used to be easy to say Astrill is what you must use if you live in China and don't know how to set up private servers (I don't). 2024 things changed and it is a lot more hassle to get a stable connection.
I have been with it for over 4 years and the price has gone up drastically in that time. I used to justify teh cost saying none of the cheaper options are as stable or trustworthy but I hear good things about others.
I am sticking with it only because I am not sure what I would change to if I moved to another service. Over the last ten years I can name a short list of other providers (some big name that sponsor YouTube ads) that I tried and they all let me down.