A man shows a welcome cardboard written to his girlfriend, one of the medics supporting virus-hit Hubei Province, in Lanzhou, northwest China's Gansu Province, March 22, 2020. The third batch of medical assistance team supporting Hubei from Gansu, which consists of 147 members, returned home on Sunday as the epidemic situation in Hubei has been greatly eased. (Photos: Xinhua)

A bus carrying medics supporting virus-hit Hubei Province runs through the downtown area of Lanzhou, northwest China's Gansu Province, March 22, 2020.

Medics supporting virus-hit Hubei Province take buses to designated places for quarantine after their arrival at the Lanzhou Zhongchuan International Airport in Lanzhou, northwest China's Gansu Province, March 22, 2020.

Medics supporting virus-hit Hubei Province arrive at a designated place for quarantine in Lanzhou, northwest China's Gansu Province, March 22, 2020.

Combo photo shows a medic (L) prepares to board a plane for Wuhan of Hubei Province at Zhongchuan International Airport in Lanzhou, northwest China's Gansu Province, Feb 19, 2020 (up) and the medic (C) arrives at the Lanzhou Zhongchuan International Airport in Lanzhou, northwest China's Gansu Province, March 22, 2020, after accomplishing her mission in Wuhan.

Combo photo shows a married couple, who are both medics supporting virus-hit Hubei Province, prepare to board a plane for Wuhan of Hubei Province at Zhongchuan International Airport in Lanzhou, northwest China's Gansu Province, Feb. 19, 2020 (up) and they fly back home at the airport in Lanzhou, northwest China's Gansu Province, March 22, 2020, after accomplishing their missions in Wuhan.

A medic bows to the welcoming crowd outside a designated place for quarantine in Lanzhou, northwest China's Gansu Province, March 22, 2020.

The flight carrying medics supporting virus-hit Hubei Province arrives at the Lanzhou Zhongchuan International Airport in Lanzhou, northwest China's Gansu Province, March 22, 2020.