A constructor goes through a mobile thermometry disinfection channel at the construction site of a metro project in Wuhan, central China's Hubei Province, March 30, 2020. Wuhan's 12 metro projects under construction resumed work up to Monday. (Xinhua/Xiong Qi)

A constructor gets his temperature checked in a mobile thermometry disinfection channel at the construction site of a metro project in Wuhan, central China's Hubei Province, March 30, 2020. Wuhan's 12 metro projects under construction resumed work up to Monday. (Xinhua/Xiong Qi)

Laborers work at the construction site of a metro project in Wuhan, central China's Hubei Province, March 30, 2020. Wuhan's 12 metro projects under construction resumed work up to Monday. (Xinhua/Xiong Qi)

Laborers work at the construction site of a metro project in Wuhan, central China's Hubei Province, March 30, 2020. Wuhan's 12 metro projects under construction resumed work up to Monday. (Xinhua/Xiong Qi)

Laborers work at the construction site of a metro project in Wuhan, central China's Hubei Province, March 30, 2020. Wuhan's 12 metro projects under construction resumed work up to Monday. (Xinhua/Xiong Qi)