Staff members wearing face masks are on duty at the Trade in Services Exhibition Area of the 4th China International Import Expo (CIIE) in east China's Shanghai, Nov. 8, 2021. (Xinhua/Jin Liwang)
COVID-19 control and prevention at 4th CIIE
Source: Xinhua| 2021-11-08 22:08:55|Editor: huaxia
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