Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

A staff member conducts disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

A staff member conducts disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)

Staff members conduct disinfection in Tonghua City, Northeast China's Jilin Province, Feb. 19, 2021. Disinfection in the public area were conducted as a COVID-19 prevention and control measure in preparation for work resumption in Tonghua. (Xinhua/Xu Chang)