A man slapped his best friend's wife who took part in a kissing competition with another man in southwestern China.<br /><br />The video filmed in the city of Zunyi in Guizhou Province on November 10, shows a man running onto a stage where couples were competing in a kissing competition.<br /><br />He then stopped in front of a woman and slapped her several times.<br /><br />According to local reports, the man is the woman's boss and he is also the best friend of the woman's husband. <br /><br />Since the woman wanted to win the prize, she went to the event with a stranger although her husband and her boss did not allow that. <br /><br />The man has apologised to the public, reports said.