YouTube and Gmail also don't work in China, which are significant. They technically didn't leave China, however, because they never entered it.
> Fact 2: Search engines are more and more irrelevant these days. All interesting new content are either from Weibo or Wechat (or other closed garden)
I think you mean to qualify that with in China?
> Fact 4: Firewalls in China has a hierarchical layers of blocking
Most of the western-world web moved to HTTPS specifically because China was inspecting plain text packets. It was interesting to watch the change over happen from 2008-2011.