Winter Olympics: What is China's Covid policy and does it work?

Beijing says it's adopting all necessary coronavirus safety measures for the 2022 Winter Olympics, which start next month.

So what is being planned for the Games, and how successful has China's policy of "zero Covid" been?

Stricter measures than at Tokyo Olympics

China is going to great lengths to keep the virus out.

It has said that foreign spectators will be barred, with only residents of mainland China allowed in to events - they must also quarantine when they leave the venues to return home. People are advised not to...