A medical worker collects swab sample from a resident at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker collects swab sample from residents at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker collects swab sample from a child at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
Medical workers keep record of residents at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker collects swab sample from a child at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker arranges swab samples at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker collects swab sample from a resident at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker collects swab sample from a child at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
A medical worker collects swab sample from a resident at a community COVID-19 testing site in Yuhua District of Shijiazhuang, capital of north China's Hebei Province, Jan. 10, 2021. The second round of the nucleic acid testing has begun in some communities in Shijiazhuang. (Xinhua/Wang Xiao)
