After taking up the sport in 2010 she became a starter in the senior group in 2023, debuting at the World Cup in Tashkent where the group won gold in the All-Around and both even finals.[3][4] Weeks later she won gold in the All-Around and silver in the two event finals in Baku.[5] From 31 May to 3 June the group competed at the Asian Championships in Manila, winning bronze in teams along individuals Wang Zilu, Zhao Yating and Zhao Yue, gold in the All-Around, with 5 hoops and with 3 ribbons & 2 balls.[6][7][8][9] In July she travelled to Milan for the last World Cup of the season, getting bronze in the All-Around and with 3 ribbons & 2 balls.[10] in late August Xinyi was selected for the World Championships in Valencia, winning silver in the All-Around and with 3 ribbons & 2 balls as well an historical gold medal with 5 hoops.[11][12]
In March 2024 she took part in the World Cup in Athens, winning bronze in the All-Around and the two event finals.[13][14] A month later in Baku they were 5th overall, 4th with 5 hoops, and 5th in the mixed event in Tashkent.[15] In June the group participated in the stage in Milan, winning gold overall and with 5 hoops as well as silver in the mixed event.[16] In August Ding, Wang Lanjing, Guo Qiqi, Hao Ting and Huang Zhangjiayang were selected for the Olympic Games in Paris. There they won an historical gold medal in the final, being only the second time China medalled in the event after 2008's silver.[17][18][19]
In 2025, Ding debuted with a renewed group (consisting of herself, Wang Lanjing, Liu Miaoting, Pu Yanzhu and Zhang Xinyi) at the World Cup in Baku, winning silver medal in all-around and mixed apparatus and gold in 5 ribbons. On April 25–27, they won bronze medal in all-around at Tashkent World Cup. They also won gold in 5 ribbons and silver in 3 balls + 2 hoops finals.[20] On July 18–20, they won bronze in all-around and gold in 3 balls + 2 hoops at Milan World Cup.[21] In late August, she was selected to represent China alongside Liu Miaoting, Pu Yanzhu, Wang Lanjing, Zhang Xinyi and Zhao Wanzhu at the 2025 World Championships in Rio de Janeiro, Brazil, where they took 4th place in group all-around.[22][23] They won gold medal in 5 ribbons and bronze in 3 balls + 2 hoops final.[24]
In 2026, Xinyi and her teammates (Pu Yanzhu, Zhao Wanzhu, Zhang Xinyi, Liu Miaoting, Wang Lanjing) started competition season in late March at Sofia World Cup. They took 4th place in all-around and won gold in 5 Balls final.[25] On April 10-12, they won gold medal in all-around at Tashkent World Cup. They also won gold medals in both apparatus finals.
China 
