US intelligence warns of Chinese interference through Tik Tok in the presidential election. Debate over bill to force Chinese owners to sell app. Can Beijing use social media to undermine American democracy? Would banning Tik Tok stop it? Analysis by BBC and Wired journalists.

The podcast features John Sudworth, The BBC's China correspondent, exploring the origins of Covid-19 in Wuhan. He investigates whether the virus emerged naturally or leaked from a Wuhan lab. Sudworth uncovers the difficulties of getting answers in Wuhan post-lockdown, revealing a city filled with suspicion and silence amidst efforts to resume normal life.