Snipe and Mussel, Fisherman Gains Profit means: It is a metaphor for the two sides arguing and losing, letting a third party take advantage of the situation.
From Liu Xiang's "Strategies of the Warring States - Yan Ce II"; "Snipe and Clam" is a fable told by Su Dai, a strategist, when he was lobbying King Hui of Zhao during the Warring States period. At that time, the king of Zhao wanted to attack Yan.
Su Dai, on behalf of the king of Yan, told the king of Zhao that the endless fighting between Zhao and Yan was just "snipe and clam fighting", which would surely allow Qin to "reap the benefits of fishing". Today's fable tells people to be wary of the real enemy in the intricate conflicts and struggles.
Expanded Information
1. Near-synonyms: fisherman's profit, both losing, mantis pouncing on cicadas, fishing for profit;
2. Antonyms: complement each other, complement each other;
3. Idiomatic expressions
(1) Fish: can't be written as "鱼"。
(2) "Snipe and mussel fight, fisherman get benefit" and "sit on the mountain and watch the tigers fight" both have the meaning of "both sides argue; as a result, both sides lose; let the third party get benefits"; but "snipe and mussel fight, fisherman get benefit" has the meaning of "both sides fight; as a result, both sides lose; let the third party get benefits". However, "the snipe and the clam fight, the fisherman gains" is more objective in describing the two sides fight each other to let the third party benefit; "sit on the mountain and watch the tigers" is more descriptive of the person's will and action.
4, idiomatic examples
(1) clean up the Japanese invasion of my peers, ~ laugh at the marquis. (Zhu De's "and Comrade Dong Biwu" No. 3 of 7)
(2) "Wave overturned the sea of blood global pity, ask who dares to barbaric law scolding strong Qin? Laughing at his snipes and clams performing storm-cloud formation." (Qing Dynasty-Xiang Lingzi "Xuan Ting Grievance - Crying at the Tomb")