Beijing is one month away from hosting the Winter Olympics.
Athletes, officials and journalists are entering into Covid-secure bubbles as soon as they arrive and will remain within it until the Games, which run from the 4 – 20 February, are over.
No fans from outside China are permitted and most of the spectators are expected to be drawn from schools, government offices and the military rather than the general public.
The Games have been clouded by international concern for former Chinese Olympian Peng Shuai. Earlier this year, the tennis star said she was "forced" to have sexual relations with former Vice-Premier Zhang Gaoli.
China Correspondent Stephen McDonell reports from the mountains outside Beijing, where access to the Olympic region has now been sealed off.
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