Stephen Sung Lin Yung is a retired Chinese football player who represented the Hong Kong football team. Starting his career in China he played for the Chinese U-20 and the Chinese Olympic team before he established himself with Chinese top-tier side Tianjin where he played as a forward. Moving away from China he joined Hong Kong football team South China and became their utility player playing anywhere on the field, though he spent most of time as a defensive midfielder where he had a successful time with them winning several cups and the 1996–97 Hong Kong First Division League title with them.