A passage in Central station, Hong Kong, is seen packed with commuters wearing face masks in the morning of March 2, 2020. (EDMOND TANG / CHINA DAILY)

Hong Kong Chief Secretary for Administration Matthew Cheung Kin-chung inspects the epidemic control measures taken at the government headquarters in Tamar, Hong Kong, March 2, 2020. (CALVIN NG / CHINA DAILY)

A security guard checks the temperature of a man before allowing him to head to the lift lobby at the Revenue Tower in Wan Chai on March 2, 2020. (EDMOND TANG / CHINA DAILY)

Two workers are seen disinfecting entry gates at the government headquarters in Tamar, Hong Kong, March 2, 2020. (CALVIN NG / CHINA DAILY)

A security guard monitors on screen people entering the government headquarters in Tamar, Hong Kong, March 2, 2020. (CALVIN NG / CHINA DAILY)

A woman uses hand sanitizer kept at a security desk as she enters the Revenue Tower in Wan Chai, Hong Kong, March 2, 2020. (EDMOND TANG / CHINA DAILY)