With a rebound of COVID-19 cases in Beijing – seven confirmed cases in three days – Beijing authorities are conducting nucleic acid tests for local residents. It's reported that the virus was detected on the chopping board handling salmon in a large wholesale market. People living in surrounding areas are required to take the test, and 48 people who said they had visited the market have been tested positive as of Saturday. CGTN's Li Jiaming brings the latest. #COVID19#coronavirus