Attached below is a reportage about Chinese traditional lower-grade clan, specifically on the one in Chengdu Plain before 1949.  The article recounts to readers the origin, historical development, hierarchical structure, social function, and even the cant (password) of the clan.  It is such a gripping report that I think you may have an interest in reading it at:

https://www.guancha.cn/WangDi/2018_12_01_481730_1.shtml