Mezue ahịrịokwu na-esonụ: Sun Jiajun (amụrụ 1 August 2000) bụ onye na-egwu mmiri na China. O ritere ihe nrite ọla edo na ụmụ nwoke 100 mita breaststroke na 4 × 100 mita mixed medley relay ihe omume na 2018 Summer Youth Olympics ẹkenịmde ke Buenos Aires, Argentina. O ritere ọlaọcha n'asọmpi ụmụ nwoke na 50 mita breaststroke na 4 × 100 mita medley relay n'otu asọmpi ahụ. N'afọ 2021, o ruru eru ịnọchite anya China na
ụmụ nwoke 4 × 100 mita medley relay ihe omume na 2020 Summer Olympics ẹkenịmde ke Tokyo, Japan.