加入 (jiā rù) means “to become a member; to join; to mix into; to participate in; to add in”. It is an HSK 4 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
他加入了足球队。
Tā jiārù le zúqiúduì.
He joined the soccer team.
Updated: 2026-07-18