蝇头微利

Explanation: The flies like the first small profit. Metaphor very small profit. 　　Usage: Partial official; as subject, object; containing derogatory 　　Source: Song Su "Man Ting Fang," the word snail horn reputation, Yingtouweili. " 　　Examples: Only for ~, discard mandarin duck is happy match. ★ Ming Feng Meng, "Ancient and Modern Novel," Volume Thesaurus:  Teeny peanut