Outs
tʃʌwɒn peɪtuː
In Chinese 出牌
In Chinese, '出牌' (chū pái) can be used to generally refer to the cards that can improve a hand, but the term 'outs' is also sometimes used directly.
Example
"我需要两张牌来组成顺子。(Wǒ xūyào liǎng zhāng pái lái zǔchéng shùnzi.)"