You may not know the name.  Well, my father used to tell me something about this legendary woman with famed personage in Shanghai "black society" before 1949.  Please read the following report if you are interested in:

https://www.toutiao.com/a6802793261321683464/

PS  I believe there have had no organized rings in China Mainland any longer.  Good for you, CCP.  BTW, the reportage repeatedly mentions one of the "Big Three" ringleaders of that time: Du Yue-sheng.  Suddenly I recalled that I did translate some citations by Du many years ago.  Kindly read it again at http://blog.udn.com/kkuo0810/7130388