File photo: Xinhua

CHENGDU, Dec. 11 (Xinhua) -- Southwest China's Chengdu launched a nucleic acid testing drive Friday, offering free tests to all residents in the city's Pidu District, where several new COVID-19 cases have emerged since earlier this week.
The district's COVID-19 prevention and control headquarters said the drive started at 6 p.m., with testing expenses covered by the district government.