Jiang Ziya is fishing, if you want it, take the hook (idiom, refers to early sage 姜子牙 fishing with no bait and the hook above the water); to put one's head in the noose
trad. 姜太公釣魚,願者上鉤
Also written 姜太公釣魚,願者上鉤【Jiāng tài gōng diào yú , yuàn zhě shàng gōu】