He was drafted by Uni-President Lions in the first round, along with teammate Yang Tung-yi, who has been his teammate since middle school. He saw his first at-bat on March 3, 2004, and hit a home run. He is the first Taiwanese player to hit a home run on the first at-bat of career in the history of CPBL.
He won the first Gold Glove and the Best 10 Award in 2006.
Next year, He batted .279 with 10 home runs, 59 RBIs, and 121 hits. He is on the top of Lions the year. In addition, he stole 31 bases. But he lost the stolen base champion because of the lower stolen base percentage. He won the Gold Glove five straight years, and the first Best 10 Award after 2007.
He hit 3 home runs in 2008 Asia Series.The Game 6 of the series, Uni-President Lions defeated SK Wyverns by his 2 homers and entered the final. At last, Uni-President Lions were defeated by Saitama Seibu Lions, they finished runners-up.
In 2009, he hit 11 home runs this season. It is the first time that he hit more than 10 home runs in one season. The first Game of the championships this year, he hit 2-run homer in 4th bottom against Brother Elephants, the Lions won the game. He was elected the MVP in this game. The Lions won the series in Game 7 eventually, completed three-peat.
He was the main leadoff hitter of the Lions in 2011. He hit 13 homers as leadoff hitter, created a new record of local players. His five leadoff homers in this year are the most ones in single season in the history of CPBL.