Tai Tzu-ying (Chinese: ???; pinyin: Dà i Ziying; Wade–Giles: Tai Tzu-ying; born 20 June 1994) is a Taiwanese professional badminton player.
At the age of 22, she became world No.
1 in the women's singles on December 2016, and holds the record for the longest occupant of the top ranking in BWF history.
Tai was the women's singles gold medalists in 2018 Asian Games and 2017 Summer Universiade.
She was back-to-back won the Asian Championships title, the year end tournament Superseries Finals, and the oldest tournament All England Open.