Danny Lee Ka-hung from the South China Morning Post participated in Hong Kong’s Covid-19 mass-testing scheme, which started on September 1, 2020. The one-off free universal testing programme began at 8am at 141 collection centres across all 18 districts in the city. By 8am on September 1, at least 590,000 residents had signed up to get the nasal and throat swabs. Here’s what it looks like.