[8] With a time of 2:05.48, he broke the world record in 200m breaststroke, which was previously established by 2020 Olympic Games champion Zac Stubblety-Cook in 2022.

[10] In the men's 4 × 100 m medley relay, the Chinese team of Xu Jiayu, Qin Haiyang, Wang Changhao, and Pan Zhanle broke the Asian record by finishing in 3:27.01.

The Chinese team of Xu Jiayu, Qin Haiyang, Zhang Yufei, and Yang Junxuan also set the new Asian record in the mixed 4 × 100 m medley relay.

[12] With his teammate Zhang Yufei, Qin Haiyang was named the MVP of 2022 Asian Games for his five gold medals.

[14] While at the 2024 Paris Olympics, Qin Haiyang lamented that; The (drug) tests come early in the morning before we’re even awake, during midday rest periods, forcing us to rest on hotel lobby sofas, and even late at night, keeping us up past midnight[15]And after a poor start to Qin's marquee individual breaststroke events where he failed to medal,[16][17] Qin would later bounce-back to swim the fastest split-times in the finals of his breastroke legs in the team events; 57.82 and 57.98 in the Mixed 4 × 100 m Medley Relay and the Men's 4 × 100 m Medley Relay to secure Silver and Gold medals respectively, and handing the United States swim team its first defeat in the latter-event since it was first-introduced into the Olympic program in the 1960 Rome Olympics.