These are more towards team collaboration. imo China doesn't have the ecosystem for open source. Too many people just take the code, rebrand and market it as their own product...
I've seen this recently with deep-learning libraries on Github (when using the search); people (located in China, according to their profile) copying other peoples' repositories (e.g. TensorFlow), changing the title, description and readme, and then trying to pass it off as their own by rewriting the revision history.
It's actually becoming an issue when using the search functionality.
I don't think it's a joke. Wechat is a highly usable app, but more importantly it is integrated with many parts of Chinese life so you use it for many things. Perhaps most importantly of all it made headway into getting people to trust online payments in China. It's not perfect but it is ahead of Facebook in some respects
does China have it's own Github "clone"?