He was the 2017 National Games of China gold medalist in the 4 × 400 metres, and he is the current Chinese record holder in that event with a time of 3:03.55.

[2] His success at the national U18 level led him to become a medal contender for the 2015 World U18 Championships in Athletics, achieving a 400 m personal best of 47.60 as just a third-grade senior high student.

[3] At the 2015 championships in Cali, Wu advanced past the first round of the 400 m but placed fourth in his semifinal and did not make the finals.

[2] The following year in the 400 m at the World U20 Championships, Wu again qualified for the semifinals and ran a faster time, but did not make the finals again.

[2] It wasn't until 2018 that Wu would achieve his first international medal in the mixed 4 × 400 m relay at the 2018 Asian Games, not to be realized until 2019 by virtue of Kemi Adekoya's positive drugs test causing the Bahraini team's disqualification.