鸥鸟不下

Explanation: Ouniao do not want to fly down. Analogy aware of others will harm themselves, to prevent double 　　Usage: As a predicate, object; for written language 　　Source: Cheng Lie Yukou Warring States "Liezi Yellow Emperor": "the sea birds who were good retting, once for each of the sea, the birds travel from the steep, steep matter to one hundred live birds rather than ... ... tomorrow the sea, steep Bird Dance not even under. " 　　Examples: Jin Chenshou "Three Kingdoms Wei Zhi Gao soft Biography": "thanks to the coffin, clothing, funeral convergence in the house." PEI Song Note: "movement within the sprout, then ~."