In the early half of 2012 season, her best achievements was the semi-finalists in All England Open, and was ranked as world number 16. Tai represented her country as the second women's singles behind Cheng Shao-chieh at the 2012 Summer Olympics in London. The 18-year-old, currently ranked 13th in the world and seeded 10th won all matches in the group stage defeating Anu Nieminen of Finland and Victoria Montero of Mexico. Her pace at the Olympics was stopped by the eventual gold medalists from China Li Xuerui in the round of 16. In September, she claimed her first Superseries title in the Japan Open and made history as the youngest player to win the Superseries title (currently the third youngest player, after Ratchanok Intanon won the India Open in 2013, and Akane Yamaguchi won the Japan Open 2013). She was expected may be nearing the upper echelons and future of the women's game, by her victory in Japan and increasingly impressive performances by significant wins over some of the top players. In October, she won the Chinese Taipei Open against Lindaweni Fanetri in a close rubber games 21–19, 20–22, 22–20. In November, she competed as the top seeded player at the World Junior Championships in Chiba, Japan, but fell in the quarter-finals to Sun Yu.