[sneakerblack]

It's in her bio:

> Media studio co-founder. has worked as Head of BBC Hong Kong Bureau & BBC Chinese News Editor. China Editor @initiumnews. Legal reporter @scmpnews and others

SCMP is a Hong Hong-based news outlet. I'm assuming she has her sources, since all you need is someone in china with a VPN or someone in Hong Kong in mainland with WeChat/Weibo account that has access to community groups