There's https://en.wikipedia.org/wiki/Tuanpai https://en.wikipedia.org/wiki/Tuanpai and https://en.wikipedia.org/wiki/Shanghai_clique https://en.wikipedia.org/w

There's https://en.wikipedia.org/wiki/Tuanpai https://en.wikipedia.org/wiki/Tuanpai and https://en.wikipedia.org/wiki/Shanghai_clique https://en.wikipedia.org/wiki/Shanghai_clique. And of course a third one - Xi organized his own clan.