Executed by charging backward, then pressing forward and kick, Chun-Li performs a push in the opponent who pushes the bottom of the screen. This attack can only be used in X-ISM mode.
Sou Hakkei can be used to neutralize fireballs.
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.
In this attack's case, the pinyin name of this technique would be "Shuang Fajin", with "Shuang" being written with 雙 instead of 双 in Traditional Chinese.