蚌鹬相持

Explanation: Compared the competition between the two sides, both sides lose, it would only benefit the third party. 　　Source: "Warring Yan strategy II": "Today the minister to, over the Yi River, the party in mussels exposed, and sandpipers pecking at its flesh, clam and clamp together the bill. Woodcock said: 'Today, no rain, no rain tomorrow, that is a dead clam. 'mussels, too, said Snipe said:' Today, no, no tomorrow, that is dead snipe. 'phase two would not care, and the birds of the Fisherman was. " 　　Examples: Qiang Fang tired of days, since the repeated difficulties, Quan Chen good at something, ~. ★ Song Guan "border in"