Producer: Joyce Liu. Camera: Wang Xiqing. China has been building what it calls "the world's biggest camera surveillance network". Across the country, 170 million CCTV cameras are already in place and an estimated 400 million new ones will be installed in the next three years.
<p>They have been blasted from car stereos on the streets of New York City, played by DJs at nightclubs across the US, dubbed into Chinese on TikTok and inspired merengue songs...