Chinese users typically rely on Shadowsocks (a SOCKS5 proxy designed to be undetectable), custom V2Ray configurations with obfuscation, or corporate VPNs that operate in legal gray areas, though the government continuously improves detection capabilities forcing constant adaptation of circumvention techniques.
Also obfs4 i believe is widely used there, either with tor or standalone(obfs4 over SSH). And dynamic port forwarding using SSH alone is widely used and fairly simple.
