Sun Jiajun (swimmer)

{{Short description|Chinese swimmer (born 2000)}}

{{Use dmy dates|date=July 2021}}

{{family name hatnote|Sun|lang=Chinese}}

{{Infobox swimmer

| name = Sun Jiajun

| image = Sun Jiajun (孙佳俊).jpg

| nationality = Chinese

| birth_date = {{birth date and age|2000|8|1|df=yes}}

| birth_place = Yichang, Hubei, China

| height = 1.83 m {{Cite web | url=https://info.hangzhou2022.cn/en/results/swimming/athlete-profile-n2008000-sun-jiajun.htm | title=Unknown}}{{Dead link | date=November 2024 | fix-attempted=yes}}

| weight = 75 kg

| strokes = Breaststroke, Butterfly stroke

| club =

| show-medals = yes

| medaltemplates =

{{MedalCountry|{{CHN}}}}

{{MedalCompetition|Olympic Games}}

{{MedalGold|{{GamesName|SOG|2024}}|4x100 m medley}}

{{MedalCompetition|World Championships (LC)}}

{{MedalSilver|2023 Fukuoka|4×100 m medley}}

{{MedalBronze|2023 Fukuoka|50 m breaststroke}}

{{MedalCompetition|Asian Games}}

{{MedalGold|2022 Hangzhou| 4×100 m medley}}

{{MedalSilver|2022 Hangzhou| 50 m breaststroke}}

{{MedalCompetition|Summer Youth Olympics}}

{{MedalGold|2018 Buenos Aires|100 m breaststroke}}

{{MedalGold|2018 Buenos Aires|Swimming at the 2018 Summer Youth Olympics – Mixed 4 × 100 metre medley relay}}

{{MedalSilver|2018 Buenos Aires|50 m breaststroke}}

{{MedalSilver|2018 Buenos Aires|4×100 m medley}}

}}

Sun Jiajun ({{zh|c=|s=孙佳俊}}, born 1 August 2000) is a Chinese swimmer.{{cite web |title=SUN Jiajun |url=https://olympics.com/tokyo-2020/olympic-games/en/results/swimming/athlete-profile-n1310777-sun-jiajun.htm |website=Tokyo 2020 |access-date=31 July 2021}} 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.{{cite web |title=Jiajun SUN |url=https://www.fina.org/athletes/1046724/jiajun-sun/medals |publisher=FINA |access-date=31 July 2021}}{{cite web |title=China's Sun Jiajun wins gold in men's 100m breaststroke at Summer Youth Olympics |url=http://www.chinadaily.com.cn/a/201810/09/WS5bbea89fa310eff303281bc2.html |website=China Daily |access-date=31 July 2021}} 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.