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 travel into the capital from other parts of the country.

It has already created an Olympic bubble by keeping the media, athletes and observers in three distinct bubbles, with the rules saying anyone entering these bubbles must be fully vaccinated or spend 21 days in quarantine.

Covid testing is carried out on a daily basis, and face masks are required at all times.