Si Yu is a professional footballer from CHN and is currently 27 years old. He is on the books of Beijing Women and wears shirt number 17. At international level, he features for China U19 Women. His main role on the pitch is Defender. He measures 169cm in height and weighs 56kg.

His latest transfer saw him join Beijing Women from Changchun Dazhongzhuoyue Women via on 2026-03-06.

Across the CFA Women's Super League 2025, Si Yu appeared in 21 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.