One of her coaches was Singapore-based Zhang Wei, a former Chinese national ice dancer who won gold with partner Wang Rui at the 1999 Asian Winter Games, who she trained with for six months in 2012.

In January 2018, she won the gold medal at the 2018 South Korean Figure Skating Championships, earning her second national title.

One week later, You won the silver medal at another Challenger, the 2019 CS U.S. Classic, winning the free skate by scoring over 140 points for the first time.

[17] Making her senior Grand Prix debut at the 2019 Skate Canada International, You successfully landed a ratified triple Axel in the short program to place second behind new training mate Rika Kihira of Japan with a new personal best score (78.22).

[19][20] You's success at Skate Canada led to her being given a second Grand Prix assignment, the 2019 Cup of China, where she placed fourth after mistakes in both programs.

[24] By doing so, she ended Russia's winning streak in girls' singles at the Winter Youth Olympics, which included previous champions Elizaveta Tuktamysheva (2012) and Polina Tsurskaya (2016).

[27] With the pandemic continuing to affect international travel, the ISU opted to assign the Grand Prix based primarily on geographic location.

You was initially without a Grand Prix assignment but was subsequently added to the 2020 NHK Trophy roster once it was clear she could travel to Japan.

[31] You began the season at the Skating Club of Boston's Cranberry Cup event, where she won the silver medal, 30 points behind champion Alysa Liu.

She next went on the Challenger series to compete at the 2021 CS Autumn Classic International, where she was considered by many to be the gold medal favourite but ultimately took silver behind surprise winner Marilena Kitromilis of Cyprus.

She landed her opening triple Axel in the free skate, albeit deemed a quarter short on rotation, and placed second in that segment despite a few other minor jump issues.

[33][34] At her second event, the 2021 NHK Trophy, You failed to land her triple Axel in either segment, but still placed third in the short program and second in the free skate to take her second bronze medal of the Grand Prix season.

[36] She and Kim were named to the South Korean Olympic team, and sent to compete at the 2022 Four Continents Championships alongside bronze medalist Lee Hae-in.

You struggled at the event in Tallinn, botching the triple Axel attempt in both segments and finishing sixth overall, behind both Lee and Kim.

[37] Competing at the 2022 Winter Olympics in Beijing, You started the women's event sixth in the short program, having her triple Axel downgraded and receiving an edge call on her flip.

This had a major impact on the women's field, which had been dominated by Russians for most of the preceding eight years, and You entered the championships as a serious podium contender.

[44] On the Grand Prix, she entered the 2022 Skate Canada International as one of the title favourites in the women's event, placing fourth in the short program after performing only a triple-double jump combination.

"[46][47] During her second Grand Prix event, 2022 MK John Wilson Trophy, You came down with a high fever and considered withdrawing from the competition.

Deciding to compete but not fully recovered, You placed sixth in the short program after performing a triple-double combination rather than a scheduled triple-triple.

She managed to skate a solid free program, however, placing third in that segment of the competition after completing six clean triple jumps and moving up to fourth-place overall.

[48][8] In January, during the 2023 South Korean Championships, You suffered a back injury and finished the competition in eleventh-place after placing ninth in the short program but fifteenth in the free skate.

[49][50][51] At the 2023 Challenge Cup, You placed thirteenth in the short program after falling on a planned triple flip and failing to perform a jump combination.

She said afterward that she and her new coaches would be working to improve her jumps and stamina, and expressed thanks to "my fans that they are waiting for me to come back and are giving me all the time I need!