Sam was born on May 3, 1962, in China and raised in
Zhongshan. After entering university in 1978 he entered law school in 1981 and earned his bachelor's degree in law from
Peking University in
Mainland China. After practicing law in China he moved to Macau in 1986, studied at the
University of Coimbra and joined the Public Prosecutions Office of Macau in 1995. Sam, alongside important Macau officials born in mainland China, including
Wong Sio Chak and
Cheong Weng Chon, are widely deemed among the 13 officials handpicked by Beijing to be nurtured to become the future governing team for the city. ==Legal career==