Tsai Chia-hsin
Tsai Chia-hsin is a Taiwanese former badminton player. He competed at the 2006 and 2014 Asian Games. Tsai also competed in the 2004 Summer Olympics in mixed doubles with partner Cheng Wen-hsing and in 2016 Summer Olympics in men's doubles with partner Lee Sheng-mu. In 2004, they defeated Chris Dednam and Antoinette Uys of South Africa in the first round but lost to Zhang Jun and Gao Ling of China in the round of 16.
Achievements
Asian Championships
Men's doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2007 | Stadium Bandaraya, Johor Bahru, Malaysia |  Hu Chung-hsien |  Koo Kien Keat Tan Boon Heong | 21–18, 16–21, 10–21 | Bronze |
East Asian Games
Men's doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2013 | Binhai New Area Dagang Gymnasium, Tianjin, China | Lee Sheng-mu | Chen Hung-ling Lu Chia-pin | 21–8, 21–18 | Gold |
| 2009 | Queen Elizabeth Stadium, Hong Kong | Hu Chung-hsien | Chen Hung-ling Lin Yu-lang | 21–17, 22–20 | Gold |
Summer Universiade
Men's doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2007 | Thammasat University, Pathum Thani, Thailand |  Hsieh Yu-hsing |  Sudket Prapakamol Phattapol Ngensrisuk | 21–17, 17–21, 14–21 | Silver |
Asian Junior Championships
Mixed doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2000 | Nishiyama Park Gymnasium, Kyoto, Japan | Cheng Wen-hsing |  Zheng Bo Wei Yili | 3–15, 5–15 | Bronze |
BWF Superseries
The BWF Superseries had two levels since 2011: Superseries and Superseries Premier. A season of Superseries consisted of twelve tournaments around the world, with successful players invited to the Superseries Finals held at the year end.Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2014 | Australian Open | Lee Sheng-mu |  Lee Yong-dae Yoo Yeon-seong | 14–21, 18–21 | Runner-up |
| 2014 | Singapore Open | Lee Sheng-mu | Cai Yun Lu Kai | 19–21, 14–21 | Runner-up |
BWF Grand Prix
The BWF Grand Prix had two levels: Grand Prix and Grand Prix Gold. This series of badminton tournaments was sanctioned by the Badminton World Federation and held from 2007 to 2017.Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2016 | Swiss Open | Lee Sheng-mu |  Kim Astrup Anders Skaarup Rasmussen | 8–21, 15–21 | Runner-up |
| 2013 | Macau Open | Lee Sheng-mu | Hoon Thien How Tan Wee Kiong | 16–21, 19–21 | Runner-up |
| 2013 | Chinese Taipei Open | Lee Sheng-mu | Kim Gi-jung Kim Sa-rang | 11–21, 11–21 | Runner-up |
| 2012 | Macau Open | Lee Sheng-mu |  Vladimir Ivanov Ivan Sozonov | 14–21, 21–17, 21–16 | Winner |
BWF International Challenge/Series
Men's doubles| Year | Tournament | Partner | Opponent | Score | Result |
| 2010 | Kaohsiung International | Liao Chao-hsiang | Bodin Isara Maneepong Jongjit | 18–21, 19–21 | Runner-up |