How long can a BBC reporter stay hidden from CCTV cameras in China? @TheJohnSudworth has been given rare access to put the world's largest surveillance system to the test http://pic.twitter.com/vLGQYN7ZB9
— BBC News (World) (@BBCWorld) December 10, 2017
from Twitter https://twitter.com/willyrozan
December 10, 2017 at 07:20PM
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