鹬蚌相争，渔翁得利鷸蚌相爭，漁翁得利yù bàng xiāng zhēng , yú wēng dé lì1.lit. when the snipe and the clam grapple with each other, the fisherman catches them both (idiom)2.fig. when two sides are locked in dispute, it's often a third party that benefitsAdd to deck