A man talks on the phone outside a restaurant amid COVID-19 pandemic in Hong Kong, south China, July 20, 2020. (Xinhua/Li Gang)

A woman wearing a face mask buys fish at a market amid COVID-19 pandemic in Hong Kong, south China, Aug. 1, 2020. (Xinhua/Lo Ping Fai)

A man wearing a face mask runs at the Victoria Harbor amid COVID-19 pandemic in Hong Kong, south China, July 29, 2020. (Xinhua/Li Gang)

A sanitation worker wearing a face mask sweeps leaves in a park amid COVID-19 pandemic in Hong Kong, south China, Aug. 1, 2020. (Xinhua/Lo Ping Fai)

A citizen wearing a face mask buys fish at a market amid COVID-19 pandemic in Hong Kong, south China, Aug. 1, 2020. (Xinhua/Lo Ping Fai)

Employees wearing face masks work at a construction site amid COVID-19 pandemic in Hong Kong, south China, Aug. 1, 2020. (Xinhua/Lo Ping Fai)

A man wearing a face mask buys breakfast amid COVID-19 pandemic in Hong Kong, south China, Aug. 1, 2020. (Xinhua/Lo Ping Fai)

People walk in the Central area amid COVID-19 pandemic in Hong Kong, south China, July 29, 2020. (Xinhua/Li Gang)

People wearing face masks walk along a street of Causeway Bay amid COVID-19 pandemic in Hong Kong, south China, Aug. 1, 2020. (Xinhua/Lo Ping Fai)