The 2021 Badminton World Championships in Spain ushered in the final battle, in a women's doubles final that attracted much attention from the outside world, Chen Qingchen / Jia Yifan, known as the "Fan Chen Combination", ushered in the challenge of the South Korean combination Li Shaoxi / Shin Seung-chan, which is familiar to the Korean team chen Qingchen / Jia Yifan, in the previous competitions, they have met 4 times, fanchen combination has won all, so the outside world is also generally optimistic that Chen Qingchen / Jia Yifan can win the game to win the championship. In the end, after two sets of competition between the two sides, Chen Qingchen / Jia Yifan swept the opponent 2:0 without bloodshed, helping Guo Yu win the first championship of this tournament.

The state of Chen Qingchen / Jia Yifan in this World Championship has been very good, 1/16 final they defeated the Peruvian combination 2:0, the next 1/8 final swept the Canadian combination 2:0, 1/4 final and semi-final with two 2:0 double kill two pairs of Japanese combinations, after entering the final, facing 4 times to lose to their own Korean combination, they did not dare to take it lightly, in the face of the interview, Chen Qingchen even used words such as "unbelievable" to express their feelings about entering the final, Afterwards, he also praised the Korean team and said that he would fight with more than 120% efforts to the end.
In the first set of the game, Chen Qingchen / Jia Yifan started with 4:0, but the opponent was also tit-for-tat, chasing points continuously, once rewriting the score to 4:5, the key moment Chen Qingchen / Jia Yifan scored 6 points in a row, directly pulling the score apart, to the innings South Korean combination suddenly broke out, they scored consecutive points to 16:14, but Chen Qingchen / Jia Yifan, who made slight adjustments, cut 7 points in a row and directly won the first set at 21:16. After the start of the second set, Chen Qingchen / Jia Yifan played all the way smoothly, and the score has been leading, but in the middle of the game, the opponent chased the points continuously and overtook at 14:12, and at the critical moment, Chen Qingchen / Jia Yifan scored 6 consecutive points to regain the lead at 18:14, and finally went to the next city at 21:17, thus sweeping the Korean combination 2:0.
After the game, Chen Qingchen / Jia Yifan two hugged together excitedly to celebrate, and then also gave their beloved rackets to the fans in the stands, and then there was an interesting scene, Chen Qingchen / Jia Yifan shook hands with the opponent to greet, the latter two came to the referee, Jia Yifan took the lead in extending his hand to the referee, trying to shake hands with the referee to thank, but due to epidemic prevention reasons, the referee did not extend his hand, just showed a smile, at this time Jia Yifan finally remembered, she immediately retracted her hand, while waving her hand to indicate that you can not shake hands, It seems that he feels that he is a little abrupt, Jia Yifan nodded to the referee several times in a row to express apologies and thanks, in the face of Jia Yifan so kind and polite, the referee was also a little embarrassed, and then the referee smiled and learned Jia Yifan's appearance in response to Jia Yifan.