把枪藏进风衣把刀放进衣袖
[bă qiāng zàng jìn fēng yī bă dāo fàng jìn yī xiù]
Hiding the Gun Inside the Coat and the Knife Within the Sleeve is a rather dramatic term suggesting secrecy and danger; hiding lethal things within one's coat and sleeves as if preparing for a clandestine operation