China's first male Olympic swimming champion Sun Yang was driving without license when his Porsche SUV collided with a bus, police said. No reports said the top sport star was injured in the accident on Sunday afternoon in Hangzhou and the 21-year-old apologized for his behavior on Monday. "I should have been a role model as an athlete and a public figure but I failed my responsibility," said Sun. "I am deeply sorry for what I have done and will reflect on my behavior. Because I have been focusing on training and competition, I ignored learning some legal knowledge, which led to my mistake," he wrote on Weibo, the Chinese microblogging equivalent to Twitter. [Photo/China.com.cn]