Foreigners eat snacks at a night market in Haikou, capital of south China's Hainan Province, March 26, 2020. South China's island province of Hainan on Tuesday reduced its existing number of cases of novel coronavirus disease (COVID-19) to zero. People's life here is gradually returning to normal. (Xinhua/Guo Cheng)

People buy food at a snack street in Haikou, capital of south China's Hainan Province, March 26, 2020. South China's island province of Hainan on Tuesday reduced its existing number of cases of novel coronavirus disease (COVID-19) to zero. People's life here is gradually returning to normal. (Xinhua/Guo Cheng)

People eat snacks at a night market in Haikou, capital of south China's Hainan Province, March 26, 2020. South China's island province of Hainan on Tuesday reduced its existing number of cases of novel coronavirus disease (COVID-19) to zero. People's life here is gradually returning to normal. (Xinhua/Guo Cheng)

A staff member checks body temperature of a customer at a snack street in Haikou, capital of south China's Hainan Province, March 26, 2020. South China's island province of Hainan on Tuesday reduced its existing number of cases of novel coronavirus disease (COVID-19) to zero. People's life here is gradually returning to normal. (Xinhua/Guo Cheng)

People buy plants at a night market in Haikou, capital of south China's Hainan Province, March 26, 2020. South China's island province of Hainan on Tuesday reduced its existing number of cases of novel coronavirus disease (COVID-19) to zero. People's life here is gradually returning to normal. (Xinhua/Guo Cheng)

People visit a snack street in Haikou, capital of south China's Hainan Province, March 26, 2020. South China's island province of Hainan on Tuesday reduced its existing number of cases of novel coronavirus disease (COVID-19) to zero. People's life here is gradually returning to normal. (Xinhua/Guo Cheng)