Early in the pandemic, Taiwan legally gathered location data from more than 600,000 of its citizens to stem the spread of coronavirus. South Korea, another east Asian democracy, has similar legal measures in place. How far are those of us who live in democratic societies willing to trust "big government" with our data? The FT’s Greater China correspondent Kathrin Hille speaks to Taiwan’s digital minister Audrey Tang and the country’s former deputy prime minister Chen Chi-mai about this data-driven approach to solving a public health emergency. Hosted by John Thornhill, innovation editor at the Financial Times.