Tsai Chia-hsin

Tsai Chia-Hsin (Chinese: 蔡佳欣; traditional Chinese: 蔡佳欣; pinyin: Cài Jiāxīn; Wade–Giles: Ts'ai Chia-hsin; born 25 July 1982) is a male badminton player from Taiwan.

Tsai competed for the Republic of China (as Chinese Taipei) in badminton at the 2004 Summer Olympics in mixed doubles with partner Cheng Wen-Hsing. 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.

References

http://www.sports-reference.com/olympics/athletes/ts/tsai-chia-hsin-1.html

This is a Chinese name; the family name is Tsai.