this is a residential community in the city of zhengzhou. the message broadcast on loudspeaker, on repeat, is, community personnel are required to show access cards. outsiders will be shot. these are the rules for outsiders, every community person must show their access card . we have verified those images. china uses an advanced track and trace system, quickly quarantining those who test positive and also close contacts. during that time, the bbc obtained this footage of conditions in a shanghai state quarantine centre. conditions were said to be poor. conditions were terrible. my roommate had one bed. many sleep next to each other. i was terrified.