In China, most of the solution would be cut down after days/weeks/months. Although the connection was encrypted, GFW would still try to guess if the connection behaviors match some VPN features according to some algorithms, then cut it down.

Currently, I'm using Algo[0] setting up VPN and use Wireguard[1] connect to it, both of them are working perfectly than other solutions I have used.

[0] https://github.com/trailofbits/algo [1] https://www.wireguard.com/