Undated photo provided by Dalian Ocean University shows members of the university's anti-epidemic volunteer team delivering supplies to students' dormitory at the university in Dalian, northeast China's Liaoning Province. Chinese cities are tightening control measures to tackle the resurgence of the novel coronavirus through the winter months following recent sporadic spikes in confirmed cases. Anti-epidemic workers stand fast at their positions regardless of the heavy wind and cold weather to support those in need. (Xinhua/Xinhua)
A medical staff member works at a community COVID-19 testing site in Xinhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 7, 2021.
A medical worker collects a swab sample from a girl at a community in Qiaoxi District of Shijiazhuang, capital of north China's Hebei Province, Jan. 6, 2021.
A staff member of epidemic prevention and control is seen at a residential compound, identified as a medium-risk area for COVID-19, in Huanggu District in Shenyang, northeast China's Liaoning Province, Jan. 6, 2021.
A staff member of epidemic prevention and control installs quarantine fences at a residential compound in Huanggu District in Shenyang, northeast China's Liaoning Province, Jan. 6, 2021.
Undated photo provided by Dalian Ocean University shows members of the university's anti-epidemic volunteer team delivering supplies to students' dormitory at the university in Dalian, northeast China's Liaoning Province.
A staff member of epidemic prevention and control passes on take-out for a resident at the entrance of a residential compound in Huanggu District, Shenyang, northeast China's Liaoning Province, Jan. 4, 2021.
A medical staff guides citizens to do nucleic acid test for the prevention of COVID-19 pandemic in Suifenhe City, northeast China's Heilongjiang Province, Dec. 11, 2020.
A medical staff member gestures at the entrance of an area under special management for COVID-19 in Huanggu District, Shenyang, northeast China's Liaoning Province, Jan. 7, 2021.
