Feature: Angels on snow - skiing doctors at Winter Olympics

BEIJING, Jan. 30 (Xinhua) -- On the Olympic alpine skiing tracks in north Beijing, a team of skiers whizzed by, among whom was Bai Peng.

Bai has practised so many times that he knows each twist and turn. He is well prepared for the 2022 Beijing Olympic Winter Games, which starts on February 4.

But he is not an athlete.

In fact, the man wearing an orange vest outside his ski gear is an anesthetist w