From China position, Taiwan is part of China.
The PRC constitution defines Taiwan as part of its territory, but Taiwan is currently administered by the
Republic of China (ROC), not the PRC.
Its a complex issue, and if you are interested, you should read about it so I dont have to explain it to you. For now, it suffices to say that Taiwan has autonomy and its own laws compared to Mainland China. This explains why in Taiwan there are many crypto-related businesses that operate quite legally even today, despite the Chinese ban on crypto.
Crime type - we are talking about local Chinese criminal law.[/i]
"Chinese criminal law" does not apply here. The Bitcointalk.org forum falls under US jurisdiction.