Ryan Choi Chun-yin (); born 9 October 1997) is a Hong Kong fencer. He competed in the men's team foil event at the 2020 Summer Olympics.

Student stage Choi started learning fencing at La Salle Primary School, and joined the fencing team after entering La Salle College, and represented the school in inter-school competitions, making a name for himself. Since Form 3, he, who is good at foil, has started special training at the Hong Kong Sports Institute. Due to the overlap of fencing practice schedules, he rarely participates in the Saturday afternoon group practice of the La Salle Fencing Team, but he still represents the school in competitions and is one of the main players in the team.

Choi won the gold medal in the individual foil event at the 2012 Asian Junior and Cadet Fencing Championships. He also won the B Grade individual foil championship in the Hong Kong and Kowloon Inter-school Fencing Competition held in January 2013. Choi briefly studied accounting at the University of Hong Kong and quit in his sophomore year in 2018 to become a full-time athlete. He was roommates with actor-singer Edan Lui during his university years.

Medal record World Championships YearLocationEventPosition2023 Milan, ItalyTeam Men's Foil3rd2025 Tbilisi, GeorgiaIndividual Men's Foil1st2026 Hong KongTeam Men's Foil2nd

Grand Prix YearLocationEventPosition2019-05-17 Shanghai, ChinaIndividual Men's Foil3rd2022-05-15 Incheon, South KoreaIndividual Men's Foil2nd2025-05-18 Shanghai, ChinaIndividual Men's Foil1st

World Cup YearLocationEventPosition2019-05-05 Saint Petersburg, RussiaTeam Men's Foil2nd2020-02-23 Cairo, EgyptTeam Men's Foil3rd2023-12-09 Tokoname, JapanIndividual Men's Foil3rd2023-12-10 Tokoname, JapanTeam Men's Foil3rd2024-05-04 Hong KongTeam Men's Foil1st2025-12-06 Fukuoka, JapanIndividual Men's Foil1st2026-01-10 Paris, FranceIndividual Men's Foil2nd2026-01-11 Paris, FranceTeam Men's Foil1st2026-04-19 Cairo, EgyptTeam Men's Foil2nd2026-05-03 Istanbul, TurkeyTeam Men's Foil3rd

Asian Championship YearLocationEventPosition2018 Bangkok, ThailandTeam Men's Foil2nd2019 Chiba, JapanTeam Men's Foil3rd2022 Seoul, South KoreaIndividual Men's Foil3rd2022 Seoul, South KoreaTeam Men's Foil3rd2023 Wuxi, ChinaTeam Men's Foil3rd2024 Kuwait City, KuwaitTeam Men's Foil3rd2025 Bali, IndonesiaIndividual Men's Foil1st2025 Bali, IndonesiaTeam Men's Foil3rd2026 New Delhi, InsiaTeam Men's Foil2nd

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