Jiāngtàigōngdiàoyú,yuànzhěshànggōu

Traditional: 薑太公釣魚，願者上鉤

Jiang Ziya is fishing, if you want it, take the hook (idiom, refers to early sage [[薑子牙|姜子牙]] fishing with no bait and the hook above the water); to put one's head in the noose