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He became one of the three Legislative Councillors of the United Democrats of Hong Kong, the first pro-democratic political party when it established in 1990. But he soon quit the party for the Hong Kong Association for Democracy and People's Livelihood (ADPL). In the first Legislative Council direct election in 1991, he contested in the New Territories North constituency but was lost to Meeting Point's Tik Chi-yuen and United Democrats' Fung Chi-wood.