| Public Service:
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| * | Member, Provisional Urban Council
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| * | Member, Legislative Council (1985-97)
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| * | Member, Urban Council (1995-97)
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| * | Member, Executive Committee, Democratic Party
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| * | Chairman, Hong Kong Alliance in Support of Patriotic Democratic Movements of China
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| * | Chief Secretary, Hong Kong Confederation of Trade Unions (1990-92)
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| * | President, Hong Kong Professional Teachers' Union (1974-90)
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| * | Vice-President, Hong Kong Professional Teachers' Union (1990-96)
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| * | Chairman of Senate, Hong Kong Professional Teachers' Union
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| * | Chairman, Chinese Textbooks Committee (1986-96)
|
