Li Xu, a 35-year-old intensive care unit doctor of the University of Hong Kong-Shenzhen Hospital, has been treating some of the most serious COVID-19 patients for more than 40 days.

"Many doctors don't like working in the ICU, because they don't like the idea of having to come face-to-face with death almost every day. But I love it because I have the chance of saving people who are facing death."

Click the video to read more about Li's story.