For the first time, Huang Jiaxin appeared internationally at the 2015 Asian Youth Championships in Doha . There she won the 200-meter run in 24.67 s and the Chinese sprint relay (1000 meters) in 2: 13.32 minutes and was fifth over 400 meters with 57.59 s. Then she reached the semi-finals over 200 meters at the Youth World Championships in Cali , in which she was eliminated with 24.29 s. In addition, she was eliminated in the first round of the 100-meter run and was disqualified with the relay in the preliminary run. The following year she won the silver medal with the 4 x 100 meter relay behind the Thai women at the Junior Asian Championships in Ho Chi Minh City in 45.41 s. In 2019 she finished sixth at the Asian Championships in Doha with the 4 x 400 meter relay in 3: 37.97 min.
Personal best
100 meters: 12.11 s (+0.1 m / s), August 3, 2018 in Dalian
200 meters: 23.76 s (+0.4 m / s), September 4, 2017 in Tianjin
200 meters (hall): 24.71 s, March 4, 2016 in Nanjing
Note: This article places the family name before the person's first name. This is the usual order in Chinese. Huang is the family name here, Jiaxin is the first name.