I visited China last year. I had a lot of issues accessing some known VPN services. My main tool to avoid censorship was using my foreign roaming and then I used VLESS on my VPS. Both approaches worked for me.

I'm not sure about rate limited by few megabytes per second, as I had rate limits like few bytes per second, when I tried to use ssh as a proxy. Few megabytes per seconds sounds like a perfect connectivity to me.