Daily Chinese Idiom Guessing Game
Gain the initiative by striking first; to beat someone to the punch.
发开始行动；制控制，制服。原指丢动手的牌主动地位，可以控制对方◇也泛指争取主动，先动手来制服对方。
《汉书·项籍传》先发制人，后发制于人。”
In chess, it's often better to attack first and 先发制人.