Invited as an ambassador by the Chinese Foundation for Hepatitis Prevention and Control, Lau said he goes to the hospital for checkups every three to six months and strictly follows his doctor's advice, so he stays healthy.

"I've been diagnosed with two diseases since childhood -- hereditary high cholesterol and Hepatitis B. Luckily, I have a family doctor to take care of me," Lau said.

He also filmed a movie with Chinese director Tian Zhuangzhuang to promote Hepatitis control and prevention, which will be released on media from September. He will also collect more funds for the foundation.

China's Ministry of Health published a five-year plan earlier this year to protect newborns and other groups who are vulnerable to the Hepatitis B virus, which is being carried by 120 million Chinese.

The plan said, by 2010 the proportion of Hepatitis B virus carriers among all children below the age of five will be less than 1 percent, while the ratio among all citizens in the country should be less than 7 percent. Among all the carriers, 20 million should have constant medical treatment, according to the Ministry of Health.