Pu Qiong, an emergency department doctor is seen standing in front of the Third People`s Hospital of Tibet, a designated hospital for novel coronavirus in Lhasa, southwest China`s Tibet Autonomous Region, February 3，2020. Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei

A medical worker conducts disinfection operations at a designated hospital for novel coronavirus in Lhasa, southwest China`s Tibet Autonomous Region, February 3，2020. Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）

Medical workers treat a confirmed patient of novel coronavirus pneumonia in Lhasa, southwest China`s Tibet Autonomous Region. Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）

Medical workers wearing protective suits enter a ward in a designated hospital for novel coronavirus in Lhasa, southwest China`s Tibet Autonomous Region, February 3，2020. （Photo: China News Service/ He Penglei）

A medical worker conducts disinfection operations at a designated hospital for novel coronavirus in Lhasa, southwest China`s Tibet Autonomous Region, February 3，2020. Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）

Doctors check the CT report of a confirmed patient of novel coronavirus pneumonia in Lhasa, southwest China`s Tibet Autonomous Region. Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）

Medical workers treat a confirmed patient of novel coronavirus pneumonia in Lhasa, southwest China`s Tibet Autonomous Region.Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）

Medical workers treat a confirmed patient of novel coronavirus pneumonia in Lhasa, southwest China`s Tibet Autonomous Region.Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）

A doctor treats a confirmed patient of novel coronavirus pneumonia in Lhasa, southwest China`s Tibet Autonomous Region. Tibet reported the first confirmed case of novel coronavirus pneumonia on January 28, 2020. （Photo: China News Service/ He Penglei）