Choi studied modeling at Dongduk Women's University, one of the top schools for female fashion in South Korea.

[8] After the callback and casting, she made her official international runway debut at Louis Vuitton's cruise show in May 2014, which took place in Monaco.

[9] In the following spring 2015 season, she became the first South Korean model to be chosen as Louis Vuitton's city exclusive for Paris Fashion Week, handpicked by Nicolas Ghesquiere himself.

"[14] In the spring 2016 season, Choi became the first asian model to walk for Hedi Slimane’s Saint Laurent fashion show.

[15] Choi was introduced in Vogue as “one of the most popular faces on the runways” in the fall 2016 season, walking over 50 different shows in New York, Paris, London, and Milan.

[19] Choi has featured in over 100 international advertising campaigns for brands including Alexander McQueen, Louis Vuitton, Saint Laurent, Versace, Dolce and Gabbana, Marc Jacobs, Coach, Prada, Bottega Veneta, Tom Ford, Gucci, Valentino, Burberry, NARS, Dior, Salvatore Ferragamo, Hugo Boss, Fendi, Max Mara, Moschino, Michael kors, Mugler and more.

[27] In April, she closed Louis Vuitton's first-ever pre-fall runway show, which took place on the Jamsu Bridge in Seoul.