Mike Tyson (L), former heavyweight boxing world champion, walks with a young boxer in Tianjin municipality, North China, Dec 4, 2010. Tyson visited Tianjin and helped promote the Tianjin International Boxing Exhibition Games and WBO (World Boxing Organization) Continental Boxing Championship event as an ambassador. [Photo/Xinhua]

Mike Tyson (back) poses for photos with young boxers during the Tianjin International Boxing Exhibition Games and WBO (World Boxing Organization) Continental Boxing Championship event in Tianjin municipality, North China, Dec 4, 2010.[Photo/Xinhua]