Women being questioned in Dongguan over potential prostitution, gambling and drugs.
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#BBCtrending: China's sex capital? (Mandarin subtitles)

19 February 2014 Last updated at 18:26 GMT

Social media users have reacted to the crackdown on prostitution in Dongguan, in southern China, by defending the city and trying to promote a more positive image

Anne-Marie Tomchak reports on how people went online to try and change perceptions.

This #BBCtrending video is now available with Mandarin subtitles.