He Siyang is a 19-year-old professional football player from CHN. He currently plays for Lanzhou Longyuan Athletics U21, wearing the number 71 shirt. He plays primarily as a Forward.

In the Chinese Football Assorciation U-21 League 2025 season, He Siyang scored 1 goals and provided 0 assists across 5 appearances, averaging 0.2 goals per game with 0 shots attempted and 0 on target.