以蚓投鱼

Explanation: Bait fishing with worms do. Compared with a smaller price for a larger harvest. 　　Usage: Partial official; as predicate; that initiate 　　Source: "Sui Shu Chuan Xue Daoheng" Chen appointed to tie Zeng Qi, Heng Tao Lang and then on the host and guest. Fifty-Yun Zeng Zeng Shi, value, and the Road, north and south, said the United States. Wei Shou said, 'Fu Zeng earthworm cast so-called fish ears. '" Thesaurus:  a modest spur to induce others to come forward with valuable contributions; throw a sprat to catch a whale