Dr. Sun is very active in his local communities， in the Chinese communities， as well as in the CKUAA-SC. He is a life time member of CKUAA-SC. He supported all major activities， including the 25th Anniversary in 1993 and World Carnival Celebration in 2008. He not only supports this organization financial旬~ but also helps to raise fund through his other connections.
Working Experiences and Active events:
1983 - 1998: Private practice in San Gabriel.
1985 - Present: President， S.S.S. Development Inc.
1990 -1997: President of Ideal Dental Health Plan
Membership in Professional Societies:
1988-1989: President，San Gabriel Chamber of Commerce.
1985-1989: Founder and Organizer of San Gabriel - Chang Hwa Sister City Committee.
1989-1990: Board Member，West San Gabriel Valley YMCA.
1991-2012: Vice-Chairman，South Hills Academy.
1995-2004: Board Member，Trust Bank.
2000-2002: Board Member，workforce Investment Committee， Los Angeles County.
2001-2004: Committee Member，Economic Development Committee，Monterey Park.
2001-2004: Committee Member，Design Review Committee， San Marino.
2001-Present: Board of Governor， Los Angeles County Natural History Museum.
2002: Co-Chairman for San Marino Measure
2003: Co-Chairman for Fund Raising for San Marino Public Library New Building