On December 17, Beijing time, the 2021 Badminton World Championships continued, the men's singles focus battle Zhao Junpeng eliminated Ruan Ri, and the national feather singles promoted to the quarterfinals. Women's singles Wang Zhiyi lost 1-2 to The Fifth Seed An Xianying and missed the quarterfinals. The Quarterfinals of the World Championships have all been born.

The last match of the day, Zhao Junpeng played against Ireland's Nguyen Il. As a male solo miao of Guoyu, Zhao Junpeng is not under pressure. In the first game, Zhao Junpeng grasped the initiative at the end of the innings and won 21-19. In the second set, Zhao Junpeng failed to chase points at the end of the innings, losing 19-21. The decider was still exciting, Zhao Junpeng took the lead in 20-17 to get the match point, and then seized the opportunity to win 21-18, 2-1 to win, and Guo Yu retained the last chance of the men's singles.
Wang Zhiyi challenged the No. 5 seed, facing An Xianying, Wang Zhiyi played very actively, winning the first set 21-17. After the second set, Wang Zhiyi saved the set point, but unfortunately still lost 20-22. In the third set, Wang Zhiyi once led 19-16. However, in such a good situation, Wang Zhiyi still failed to grasp it, losing 5 consecutive sets 19-21 and losing 1-2 on aggregate. Ahn will compete with Akane Yamaguchi for a place in the semi-finals.
Even so, in the women's singles competition, Guo Yu still occupied 3 seats, He Bingjiao and Han Yue successfully met in the 1/4 final, Guo Yu locked a place in the women's singles semifinals, and Zhang Yiman also advanced to play against the No. 7 seed Indanon.
Women's doubles Li Wenmei / Zheng Yu suffered a defeat against the Japanese duo of Iwanaga Suzu / Nakanishi Takaei, and were out 1-2 (12-21, 21-17, 18-21). In this way, in the women's doubles quarterfinals, guoyu only has the number one seed Jia Yifan/Chen Qingchen.
The men's doubles national feathers duo He Jiting / Tan Qiang played a wonderful game 2-1 (17-21, 21-14, 21-16) to defeat Olympic bronze medalist Xie Dingfeng / Su Weiyi to advance to the quarterfinals, retaining the opportunity to help guoyu to impact the medal.