Executed by performing a half-circle rotation backwards and pressing kick, Chun-Li somersaults forward with one of her legs outstretched, slamming it into the ground as she lands. The Sen'enshu (from the Alpha series) and Hienshu (from the EX series) are precursors to this move.
It is best used as a quick assault move or a countering move. The length of the move depends on the strength of the kick button pressed, with the weakest barely stretching in front of her (good for close-up attacks), and the strongest stretching just about half the stage.
This move is best used as a counter for projectiles when throw at mid to close range. However, it is extremely vulnerable to anti-air attacks and invincible counters, and so should not be used too predictably.
The Sen'enshu (旋円蹴, Sen'enshuu, "Spinning Circle Kick") launches Chun Li into the air in the Vs. series games, similar to its descendant, the Hazanshu. In the Alpha series, the Sen'enshu doesn't leave ground.
In the Street Fighter IV games and Street Fighter III Third Strike, this move also has an EX Special version. In SF3:TS is goes straight up and then down, but in SFIV it moves forward about the same distance as the roundhouse version, although it rises very fast and comes down slower. Both EX versions of this move cause knockdown.