水清无鱼

Explanation: Taiqing water, the fish could not keep the body on the person too demanding, no one can become his partners. Analogy too mean little man disadvantage, it can not unite people. 　　Usage: Complex sentence; as the predicate clause; containing derogatory 　　Source: Han Ban "Ban Gu": "it is clear water without fish, were not only the police." Thesaurus:  when the water is very clear,there will be no fish— one should not demand absolute purity