Sun Jiajun (, born 1 August 2000) is a Chinese swimmer. He won the gold medal in the boys' 100-metre breaststroke and 4 × 100-metre mixed medley relay events at the 2018 Summer Youth Olympics held in Buenos Aires, Argentina. He also won the silver medal in the boys' 50-metre breaststroke and 4 × 100-metre medley relay categories in the same event. In 2021, he qualified to represent China in the men's 4 × 100-metre medley relay event at the 2020 Summer Olympics held in Tokyo, Japan.
See also List of Youth Olympic Games gold medalists who won Olympic gold medals
References
External links
Sun Jiajun at the Paris 2024 Summer Olympics (archived, alternate link)