China tightens COVID-19 curbs in Beijing, Zhengzhou Posted by covid 19 updates May 7, 2022 ShareCNA Beijing shut dozens of metro stations and bus routes on Wednesday (May 4) in its campaign to stop the spread of COVID-19. The city of Zhengzhou has also ramped up pandemic controls, as CNA’s Olivia Siong reports. covid 19 updates May 7, 2022