1996 - Legal Counsel, Central Bank of Taiwan
2000 - Legal Counsel, Ministry of Economic Affairs, Taiwan
2002 - Member, Appeals Review Committee, Ministry of Foreign Affairs, Taiwan
2005 - President, Taiwan University Law Foundation1997 - Standing Director 1989 - Director 1997-1998 - Chairman of Director Board,Judicial Reform Foundation
2000-2007 - Chairman of Director Board,Judicial Reform Foundation 1995-2009 - Standing Director1995 - Director 1992-1994 - Vice President, APAA
1997 - Counsel Member 2009 - Director , Taiwan Comparative Law Foundation
2004-2010 - Director, Legal Aid Foundation
2005-2008 - Committee Member,The National Property Management Committee, Ministry of Finance, Taiwan
2002-2007 - Committee Member, National Archives Administration, Executive Yuan
2002-2006 - Member, Human Right Consultative Committee, The President Office
2006 - Counsel, Executive Yuan, Taiwan
2005 - Legal Counsel,Ministry of Foreign Affairs, Taiwan
2006 - Chairman, Commission of Justice, Democratic Progressive Party
1991-1995 - Standing Supervisor, Arbitration Association of R.O.C.
1985-1987 - Director 2002-2007 - Director 2003-2004 - President,Taiwan Bar Association
2002-2005 - Standing Director 1993-1996 - Director
1997-1999 - President,Taipei Bar Association 1990-1993 - Standing Director 1996-1999 - Standing Director 1981-1983 - Director 1987-1993 - Director 1996-1999 - Director 1997-2000 - Counsel Member, IPBA
1997-2009 -Standing Director,APAA in Taiwan 1996-1999 - Director 1993-2009 - Director 1978-1980 - Supervisor 1995-2002 - Chairman of Supervisor Board, Institute Of International Affairs of Taiwan1991-1995 - Director 1991-1992 - President, Taiwan law Society1975-1976 - Secretary General 1979-1980 - Secretary General 1976-1977 - Director 1979-1982 - Director 1985-1986 - Director 1991-1992 - Director1985-1986 - Director 1977-1987 - Chairman of International Affairs Committee
1977-1985 - Alternative Councillor, LAWASIA
1992-1996 - Chairman of Director Board, Taipei Po-Ai Foundation
1989-2000 - Visiting Professor,McGeorge School of Law
1981-1996 - Lecturer, Soochow University Law School
1971-2004 - Lecturer, Chinese Culture University Law School
1966-1973 - Judge, Taipei District Court
1965-1966 - Public Prosecutor, Taiwan Taichung District Court