Wing Chun (sometimes written as Ving Tsun) is a concept based martial art system and an effective form of self-defense originating from Southern China. It specializes in close-range combat (the Chi Sao range) by utilizing striking, trapping and grappling. The core universal concepts are simplicity, covering the potential area of attack, economical motion, minimal use of brute force and directness. They are expressed through speed, simultaneous attack and defense, redirecting or borrowing incoming force, balance and body alignment, the center-line principle, reflexes and sensitivity.