Chin Na or Qinna (擒拿, pinyin: qín ná, Wae-Giles: ch'in2 na2) is a Chinese term describing techniques used in the Chinese martial arts that control or lock an opponents joints or muscles/tendons so he cannot move, thus neutralizing their fighting ability. Also chin na su, su meaning technique (actually traditional Chinese: 術; pinyin: shù). Chin na su literally means technique of catching and locking in Chinese. Some schools simply use the word na to describe the techniques.