A knee strike performed after placing yourself behind your opponent while leaping into the air.
Evaluation
Chun-Li's cross-up command normal. Used at close range to punish whiffed throws and catch inexperienced opponents.
How to Use
Try throwing it out carelessly until your opponent figures out how to deal with it.
How to Counter
Chun-Li's cross-up command normal. Used at close range to punish whiffed throws and catch inexperienced opponents.
Recommended Counter
It only has a cross-up hitbox, so walk forward to avoid it and get a guaranteed punish. As you can see in the video, the landing recovery is also very large. There is a 13F landing recovery, so go for a Punish Counter combo after avoiding it.
The key to countering 3HK is to always walk forward. If you hold back-guard it will hit you, so especially for beginners it's important to resist the urge to back-guard and instead commit to walking forward.
For characters who walk slowly or have a tall hurtbox, walking forward may not be fast enough to avoid it. In that case, try placing a standing LP — it will anti-air it even if your reaction is a bit late.