I'm curious what other "Chinese communities" they use. It says "Reddit, Hacker News, and Chinese communities (Zhihu and others)" which leaves me curious. I don'

I'm curious what other "Chinese communities" they use. It says "Reddit, Hacker News, and Chinese communities (Zhihu and others)" which leaves me curious. I don't think they're hiding anything so it's weird to not say. Cool tracker though.