China's snooker prodigy Ding Junhui celebrated his 20th birthday by visiting children with congenital heart disease in Second Artillery General Hospital on Sunday, April 1, 2007. He expressed his wish to pay more attention to those suffering the heart disease. Ding Junhui was knocked out of the just-concluded 2007 China Open snooker tournament by the British player Barry Hawkins last Wednesday. He clinched his breakthrough title in Beijing two years ago and made it to the final four in 2006.