Ni Xiaohui's colleague writes Ni's name on his protective suit at the beginning of day's work on Feb 27, 2020.. [Photo by Wang Jing/chinadaily.com.cn]

Patients praise Ni Xiaohui and his colleagues on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Patients exercise at a makeshift hospital converted from a sports stadium in Wuhan on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

A medical worker talks to a tearful, homesick patient on Feb 27, 2020. [Photo by Wang Jing/China Daily]

Medical workers wave goodbye to patients discharged from the makeshift hospital in Wuhan on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Ni Xiaohui takes a break on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

The interior view of the makeshift hospital where Ni Xiaohui works on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

The interior view of the makeshift hospital where Ni Xiaohui works on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Ni Xiaohui inspects CT scan images of a patient's lungs on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Ni Xiaohui inspects CT scan images of a patient's lungs on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Ni Xiaohui talks to a patient on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Ni Xiaohui reports his work on the phone on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]

Facial masks leave streaks on Ni Xiaohui's face after a whole day's work on Feb 27, 2020. [Photo by Wang Jing/chinadaily.com.cn]