Stephen Sung Lin Yung (born 7 May 1965 in Tianjin) 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.^[1] 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.^[2]

Sung would then become a Hong Kong permanent resident before he played for the Hong Kong national team and played a major role in Hong Kong's World Cup Qualifiers in 1997. By 1998, he moved to other Hong Kong football teams Sing Tao and then Instant-Dict as well as represented Hong Kong during the 1998 Asian Games football event before he retired.

South China AA

• Hong Kong First Division League: 1996–97
• Hong Kong Senior Shield: 1995–96, 1996–97
• Hong Kong Viceroy Cup: 1993–94, 1997–98
• Hong Kong FA Cup: 1995–96