In the early days, the firewall only intercepted and reviewed outbound traffic, that is,Passive detection. Shadowsoks' encryption protocol design makes the transmitted data package itself have almost no characteristics, and it looks similar to a completely random bitflow, which can indeed effectively bypass GFW in the early days. Contrary to Shadowsoks, Trojan does not use self-defined encryption protocols to hide itself. On the contrary, the clearly characterized TLS protocol (TLS/SSL) is used...