At diverse World Tour events he reached the final. So for example the Asian Games, where he beat Kong Linghui. In the final he lost to Wang Liqin. At the Greand Finals at the end of the year 2002 he won his first singles title. He beat again Kong Linghui. In the quarterfinals he beat Jean-Michel Saive. Than he beat the Chinese top star Wang Hao and the Austrian table tennis player Werner Schlager. This was his first international single title. Already in 2002 he beacame best Taiwanese table tennis player. In 2003 he clambered from place 40 in the world rankings to place 7. His mother was very proud and trained very hard with him, too. She's a very important coach of him. After a very successful season 2002 he would like to plays so too in 2003- he played his first World Championships but lost in the Round of 16 to Joo Se-hyuk. In the doubles he lost, too. Chuang played more international event but he doesn't got a success. But in this year he won World Tour Brasilia Open. 2011 in Chile and 2012 in Spania he won these torunament, too. The next years he played very good, again. At the London 2012 Olympics he beat in the quarterfinals Adrian Crișan and reached so the semifinals- the fourth place was him sure, now. In a spectaculary match against Chinas Wang Hao he lost very scarce with 2:4 games. At the bronzemedal-macth hw had the chance to win. In a very important match for Chuang he lost 2:4 too and became the fourth place. With the team he got place 5-9. Despite these losing was it Chuangs best placement at Olympics. In 2013 he took part in the World Championships, where Chuang got his best position ever- the quarterfinals. In the doubles he reached the 1st place after beating a Chinese duo in the final. This was the first gold for the country Taiwan anyway. At the World Cups from (2004-2015) he reached six times the quarterfinals. 2014 he won bronze with the Taiwanese team at the WTTC, at the Pro Tour Gran Finals he only reached the quarterfinals. At the WTTC 2015 he lost already in his first match against Ádám Pattantyús. At the World Cup, wehere he played for the 7th time, he reached the quarterfinals again. At the Pro Tour Grand Finals (today World Tour Grand Finals) he can't reached the final and slipped on place 14 in the world rankings. At the WTTC 2016 the team of Taiwan became only the 17th place, at the Olympics 2016 Chuang lost in a strong match against Ma Long and became a place from 1-32. In this year he was dated from Chen Chien-An and was to that moment not the best Taiwanese table tennis player. At Asian Games and World Cups he doesn't and fell back on place 34. But through the reaching of the Round of 16 at the WTTC 2017 in Düsseldorf he climbs on place 7 back.