ㄒㄧㄢxiānㄒㄧㄚˋxiàㄕㄡˇshǒuㄨㄟˊwéiㄑㄧㄤˊqiáng

  1. 別人掌握時機優勢警世通言·二四·玉堂春落難》:鴇子不若先下手為強。』」醒世恆言·○·俠客》:自古先下手為強不依其間!」

strike first and gain the upper hand (idiom, martial arts term)​; Making the first move is an advantage.