Beijing has publicly confirmed and defended holding a young Taiwanese businessman for six hours of questioning at Shanghai's border, a warning sign for anyone from Taiwan traveling to China.

• A Taiwanese man who once worked part-time for Amnesty International was pulled aside on arrival in Shanghai and questioned by three plainclothes officers.
• Officers made him unlock his phone and went through his chats, photos, and email, asking about human rights work on Xinjiang, Tibet, and Hong Kong, his funding, and his political contacts.
• He gave up on entering the country and flew home; China's Taiwan Affairs Office called the screening entirely lawful because his former employer is an "anti-China" group.
• Taiwan's mainland affairs body said the admission proves the risk is real and that no one should keep making excuses for Beijing.
• China countered that millions of Taiwanese visit each year without trouble as long as they follow the rules.

Outlook: Taiwan is keeping its travel warning for China in place and will likely push harder to discourage non-essential trips.