You was elected as the first non-
Kuomintang member of the
Control Yuan in 1980. After the establishment of the DPP in 1986, he first served as a member of the
Legislative Yuan from 1987 to 1989, and then served two terms as the magistrate of
Taipei County from 1989 to 1997. He was again elected to the legislature in 2001 and reelected in 2004. In 2006, You went on a three-day trip with a legislator group to the
United States to discuss a bilateral
free trade agreement between the two countries with
Oregon Senator Ron Wyden and other U.S. officials. You became the Taiwanese representative to Germany in 2007 and served until 2008. ==Personal life==