China Olympic swimming champion Sun jailed for seven days 4 November 2013 Last updated at 14:45 Chinese Olympic swimming champion Sun Yang has been sentenced to seven days in police detention for driving without a licence. He was caught when a Porsche jeep he was driving in his hometown of Hangzhou collided with a bus on Sunday. Sun won Olympic gold in the 400m and 1,500m freestyle events at London 2012. In a statement, the swimmer apologised and said he had a poor knowledge of the law because he had been "focusing on training and competition." Writing on Weibo, China's equivalent of Twitter, the 21-year-old athlete said he had failed as a role model, and he would reflect on his behaviour. According to Chinese state media, Mr Sun claimed the jeep he was driving belonged to a relative. The swimmer - China's first male Olympic swimming champion - has been in the news before for his exploits out of the pool. Earlier this year he reportedly fell out with his coach over a relationship with an air hostess.