[4] Chang made her debut at the biennial World Archery Championships in 2013, winning the women's team recurve title with Ki Bo-bae and Yun Ok-hee after defeating Belarus in a low-scoring final.

[17] Her opponent in the final was Germany's Lisa Unruh, who had unexpectedly reached the gold medal match after concluding the ranking round in twenty-first place.

[21][22] She later finished as the runner-up in the women's individual event after losing to the Russian world number three Ksenia Perova in the gold medal match.

[23] Chang began 2018 strongly with victory in the first stage of the Archery World Cup in April, dropping just two points in the final against China's An Qixuan.

Her win was notable for her precise shooting in the match's second set, where from a distance of 70 metres (230 ft) she placed her three arrows within three centimetres (1.2 in) of one another inside the target's innermost ring, a feat lauded as one of the finest achievements recorded in a modern recurve competition.

[27][28] These results ran contrary to expectations of her winning gold in all three events and came amid wider South Korean sporting disappointments at the Games.

[27][29] The Korea JoongAng Daily suggested that the pressure placed on her shoulders to succeed contributed to her inconsistent form, commenting that her "struggle seemed to be more mental than a lack of skill.

[2] In 2019 Chang partnered Choi Mi-sun and Kang Chae-young at the World Championships in June, achieving a silver medal in the women's team event after the trio lost to Taiwan in the final.

[31] By July of that year Chang had been identified by the magazine Bow International as having noticeably dipped in form since the beginning of 2018,[32] and in September she was eliminated from the national selection process for the 2020 Summer Olympics after finishing outside the top 20 qualifiers.