A video showing a university professor in China having sex with a female student in a classroom has gone viral on the internet. The 45 second footage, recorded by a student hidden by a window with a phone camera, allegedly shows the professor of a university in the city of Jiangsu, China having sexual intercourse with a female student on a desk. The user uploaded the video on Weibo, China equivalent of Twitter. Sources say an investigation is under way for breach of ethical conduct.