On December 15, 2021, the Badminton World Championships continued to be held in Spain, the national feathers ended the second round of eight matches, the result was 4 wins and 4 losses, 5 people advanced to the singles round of 16, Han Yue and Zhang Yiman did not play, the opponents of the two retired due to injury, broke out three cold games, the men's singles fourth seed Zhou Tiancheng, mixed doubles top seed Zheng Siwei / Huang Yaqiong, the sixth seed Ellis / Smith were eliminated.
Men's singles Lu Guangzu 2-1 reverse Chinese Taipei star Zhou Tiancheng, ending the three consecutive defeats between the two sides, this is the first time in his career to defeat Zhou Tiancheng, the fourth seed was eliminated, followed by a brother of India, Srikanter, who eliminated Li Shifeng 2-1, once ranked first in the world, hoping that Lu Guangzu can break through himself and strive for another good result.
Zhao Junpeng defeated Japan's Hanggui Watanabe 2-0, and the next round against Ireland's Nguyen Il, competing for a place in the quarterfinals, the Japanese men's singles team was only One Tokiyama Kantai, Nishimoto Boxer lost 1-2 to Indian teenager Lakshya.
Women's singles He Bingjiao beat France's Bartomeni 2-0, followed by a Danish sister Mia, Han Yue against Canada's Li Wenshan, Zhang Yiman waiting for the winner of Chaiwan and Kim Jia'en, the top seed Chinese Taipei's Dai Ziying swept Russia's Kossetkaya 2-0, and India's sister Sindhu beat Austria's Lipika 2-0.
Men's doubles Liu Cheng/ Huang Kaixiang lost 1-2 to the Japanese duo of Hogi Tsurugi / Yugo Kobayashi, and Olympic champions Chinese Taipei duo Li Yang / Wang Qilin defeated the Dutch duo of Gill / Van der Luk 2-1.
Women's doubles Chen Qingchen / Jia Yifan beat the Peruvian duo of Sarazah / Regal 2-0, followed by the Canadian duo of Cai Wanting / Hongdrick, the Japanese combination of Matsumoto Mayu / Nagahara and Kona 2-0 eliminated the Danish duo of Boothher / Schultz, Matsuyama Nawei / Shida Chiyo 2-0 to the host team Azul Mendi / Corales.
Mixed doubles top seed Zheng Siwei / Huang Yaqiong lost 1-2 to Hong Kong combination Zhang Dezheng / Wu Yongyao, the world champion was upset, Ou Xuanyi / Feng Xueying lost 0-2 to the Russian combination Arimov / Davletova, the No. 6 seeded British duo Ellis / Smith lost 1-2 to the Japanese combination Kyohei Yamashita / Shinoya Naori, and the Japanese combination Ofuda Watanabe / Higashino Yuisa eliminated the Russian combination Ofemin / Dimova 2-0.
Entering the fourth matchday, Guoyu had six matches, the women's singles Wang Zhiyi against Germany's Li Yifeng, the men's doubles Zhang Nan / Ou Xuanyi challenged the Malaysian combination Xie Dingfeng / Su Weiyi, Tan Qiang / He Jiting against the British combination Henming / Storwood, the women's doubles Liu Xuanxuan / Xia Yuting against the Indian combination Ofski / Ponnapa, and the mixed doubles Guo Xinwa / Zhang Shuxian against the Danish combination Ofbol / Christiansen.