Ng was born in Hong Kong in 1877[1] in a merchant family. After he graduated from Queen's College.[2] He joined the Yuen Fat Hong, the oldest and then the largest Nam Pak Hong in Hong Kong and became the English correspondent and manager of the shipping department.[2][3] He was also compradore to the National Bank of China with his brother Ng Long-chow as his assistant,[2] as well as compradore to the Shewan, Tomes & Co. when C. A. Tomes was in charge. He later quit the Shewan, Tomes & Co. and started his own import-export firm of Hontsz & Co.[3][4] He also owned two piece-goods shops at Canton.[2]
Ng began his public service by serving on the Sanitary Board as a member. He was appointed an unofficial Justice of the Peace in 1909 and a member of the District Watchmen Committee in 1910, which was the advisory board to the Secretary of Chinese Affairs.[3] Ng was also member of the Council and Court of the University of Hong Kong.[3]
He was also director of the Tung Wah Hospital in 1907 and member of the Hospital's Advisory Committee,[3] which was the most prominent charity organisation with high social status in the Hong Kong Chinese community. He was also founder of the Tsan Yuk Hospital.[1] He held other public posts such as member of the Chinese Permanent Cemetery Committee, Chinese Public Dispensary Committee and the Po Leung Kuk Permanent board of directors.[3]
He was appointed unofficial member of the Legislative Council in June 1922 as one of the Chinese representative in the Council in succession to Lau Chu-pak who died in office.[3][4] As member of the Legislative Council he was an ex-officio member of the Executive Committee of the Chinese General Chamber of Commerce.[4][5] He was also honorary patron of the Chamber.[6]
