the chinese owners, bytedance, deny passing users�* information to the chinese government. the uk is following the us and european commission in banning the app from government devices. now on bbc news, the programme, fault line: the un and the quake in syria. screaming. the earthquake strikes. un aid arrives in turkey immediately, but take several days to reach northwest syria. bbc news arabic investigates. un teams are supposed to deploy within 48 hours of a request. in northwest syria,