Ma Xiaohai

Ma Xiaohai (马尧海) is a 53-year-old computer science professor at Nanjing Technical University under arrest for organising wife-swapping events. He was sentenced to 3.5 years in jail, "a more severe punishment because he did not admit the malicious and illegal nature of his conduct," according to the court.

In the so-called "swingers trial" in Nanjing, Jiangsu Province, he is the only one among 21 defendants to have plead "not guilty" to accusations of "group licentiousness" (聚众淫乱罪). The activities took place from 2007, and from September 2009 he was under police surveillance.

Ma was defended online by renowned Chinese sexologist Li Yinhe.