Aerial photo taken on Jan. 18, 2021 shows Lijinghua Village of Wangkui County in the city of Suihua, northeast China's Heilongjiang Province. Wangkui County has been classified as a high-risk area for COVID-19 since 7 a.m. Wednesday in the wake of newly emerged cases, according to the county's epidemic prevention and control headquarters.Photo:Xinhua

Aerial photo taken on Jan. 18, 2021 shows Lijinghua Village of Wangkui County in the city of Suihua, northeast China's Heilongjiang Province. Wangkui County has been classified as a high-risk area for COVID-19 since 7 a.m. Wednesday in the wake of newly emerged cases, according to the county's epidemic prevention and control headquarters.Photo:Xinhua

Aerial photo taken on Jan. 18, 2021 shows Lijinghua Village of Wangkui County in the city of Suihua, northeast China's Heilongjiang Province. Wangkui County has been classified as a high-risk area for COVID-19 since 7 a.m. Wednesday in the wake of newly emerged cases, according to the county's epidemic prevention and control headquarters.Photo:Xinhua