Hongkong Yisen Investment congo sarl i think is a pseudo for Hongkong excellen mining, possible ties to Cong Mao Huai AND Zijin.
As noted https://twitter.com/search?lang=en&q=%23Congmaohuai
It's only listed employee is listed here, also has an "interest" in Zijin.
https://www.linkedin.com/in/%E9%9B%A8%E7%94%9F-yusheng-zhang-%E5%BC%A0-213ba8184/?originalSubdomain=cd