A staff member marks the disinfecting time in a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

Staff members prepare to disinfect a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

Staff members record the disinfecting log at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

A staff member disinfects a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

A bus dispatcher measures a driver's temperature at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

A staff member disinfects a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

Staff members disinfect a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

A staff member disinfects a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)

A staff member disinfects a bus at a bus station in Beijing, capital of China, Jan. 27, 2020. Beijing Public Transport Corporation has taken measures such as disinfecting buses, measuring the temperatures of staff members and ensuring staffs working with face masks to prevent the spread of novel coronavirus. (Xinhua/Ren Chao)