GitCode, a git-hosting website operated Chongqing Open-Source Co-Creation Technology Co Ltd and with technical support from CSDN and Huawei Cloud.
It is being reported that many users’ repository are being cloned and re-hosted on GitCode without explicit authorization.
There is also a thread on Ycombinator (archived link)
Not like MS couldn’t be sued.
It may be expensive but possible.
Unlike China. Good luck suing china (or the chinese government) as a whole. Maybe you’ll get out a domestic ban but I can hardly believe that they will care and probably will continue with their operation. But now it’s not on very legal grounds.