I personally don’t care if someone “steals” my code (Here’s my profile if you want to do so: github.com/ZILtoid1991 ), however it can mean some mixture of two things:

1. China is getting ready for war, which will mean the US will try its best to block technology, including open source projects.
2. China is planning to block GitHub due to it being able to host information the Chinese government might not like.

Of course it could mean totally unrelated stuff too (e.g. just your typical anti-China and/or anti-communist paranoia sells political points).