
A staff member works at the producing workshop of face mask in a medical devices company in Nan'an District of southwest China's Chongqing, Jan. 27, 2020. (Xinhua/Wang Quanchao)

A staff member works at the producing workshop of face mask in a medical devices company in Nan'an District of southwest China's Chongqing, Jan. 27, 2020. (Xinhua/Wang Quanchao)