China sex trade infiltrates international hotels
BBC调查：中国性交易向国际酒店渗透
British Broadcasting Corporation, October 11, 2013
EN: http://www.bbc.co.uk/news/world-asia-china-24487270
CH: http://www.bbc.co.uk/zhongwen/simp/china/2013/10/131011_china_hotel_vice.shtml