Male sexual assault urgently requires legislation, report Wu Wencong, Cao Yin and Zhang Yuchen.

At least four cases of sexual assaults on men have been reported in the media in the past three months.

One of the attacks is alleged to have happened 15 years ago in Shanghai, when former students accused a physics teacher from a prestigious high school of sexually assaulting them. Although no legal action was taken by the accusers, the teacher was dismissed.