Mark King of England competes against Ding Junhui of China during their second round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 29, 2013. (Xinhua/Wang Lili)

Ding Junhui of China competes against Mark King of England during their second round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 29, 2013. (Xinhua/Wang Lili)

Ding Junhui of China competes against Mark King of England during their second round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 29, 2013. (Xinhua/Wang Lili)

Ding Junhui of China competes against Mark King of England during their second round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 29, 2013. (Xinhua/Wang Lili)

Mark King of England competes against Ding Junhui of China during their second round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 29, 2013. (Xinhua/Wang Lili)