"The Cyberspace Administration of China recommends banning the dissemination and discussion of topics related to overseas investments such as U.S. stocks."

That picture circulating everywhere is fake news.
Recently, topics about U.S. stocks have indeed been very popular, with Futu Tiger being fined and the State Council issuing new regulations. There are already enough real regulatory news, and fake news has also started to increase.
AI-generated images can be made in seconds, anyone can produce one.
In the future, when you see such "breaking news," it's better to verify first.
If there's nothing, you can basically treat it as false.