"A CCTV current affairs program that aired on Sunday night detailed what it said was a confession by a Taiwanese man, Morrison Lee (李孟居), who was arrested on Oct. 31 last year during a visit to Shenzhen after traveling to Hong Kong in August that year."

What was he 'guilty' of? Taking photos of police massing on the HK border in preparation for the crackdown on HK, then sharing the photos on LINE.

My advice to anyone with pro-democracy views is: 'Don't go to China'.

If you're a politician spruiking the Belt and Road then you'll be fine - you'll be feted and flattered. But if you've posted support online for Taiwan, Honk Kong, Xinjiang, or Tibet, then it's gotten to the point where it's almost an act of stupidity to visit China.