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Hakkei (発勁 Hakkei?, "Fajin/Force Exert") is one of Chun-Li's unique attacks, introduced in Street Fighter III: Third Strike. In Street Fighter IV it was reduced to a close proximity normal heavy punch, but in Ultra Street Fighter IV and Street Fighter V it was restored to a unique attack.
Executed by pressing back and heavy punch at far range, Chun-Li will thrust her palms forward (similar to her Kikosho). The attack can destroy projectiles but is not very useful for anything else due to its short range. In Street Fighter IV it completely loses its projectile negating abilities due to it being changed to a normal technique, but its prowess is restored in Ultra Street Fighter IV and Street Fighter V as a projectile negating unique attack.
The original name of this term is known as "fajin" (発勁) in pinyin, a term used in Chinese martial arts that involves use of internal energies and explosive force. "Hakkei" is the term's on'yomi reading.