[3][4][5] She also won three more individual medals: gold on the balance beam, silver on the floor exercise behind Shang Chunsong and bronze on the uneven bars behind Liu Tingting and Cheng Shiyi.

[5] In June, Ou was selected to represent China at the inaugural Junior World Championships alongside Wei Xiaoyuan and Guan Chenchen.

[10][11][12][13][14][15] After the postponement of the 2020 Summer Olympics due to the COVID-19 pandemic, Ou increased expectations for her senior debut by showing upgrades on all four events at an internal test in early September.

[20] In July, Ou was selected to represent China at the 2020 Summer Olympics alongside Lu Yufei, Tang Xijing, and Zhang Jin.

[21] Due to an Achilles injury, she only competed on the vault, uneven bars, and balance beam during the qualification round where she helped the Chinese team finish third.

She placed second in the all-around final behind Qiu Qiyuan and ahead of Zhang Qingying, as well as first with her team, third on balance beam and fourth on floor exercise after making minor mistakes.

[26] In August, Ou compete at the 2021 Summer World University Games in Chengdu, China along with Wei Xiaoyuan, Du Siyu, Luo Huan, and Zhang Jin.

In October, she was selected to compete in Antwerp for the 2023 World Artistic Gymnastics Championships alongside Qiu Qiyuan, Zhang Qingying, Zhou Yaqin, Huang Zhuofan and Wu Ran.

In June she was selected to represent 2024 Olympic Games in Paris alongside Qiu Qiyuan, Zhou Yaqin, Zhang Yihan, and Luo Huan.