毫毛不犯

Explanation: Cents: hair. Not the slightest encroachment. Described as very clean or discipline. 　　Source: Jin Chang Qu "Huayang Guanghan Shinv" pure independence, clean, hairs do not make, Song Yi Han sigh, heard three Secretaries of the table. "And" State of South Africa and Zhining "Guanghan Cheng pure, single Shangqing Lian, hairs do not make, Yi Han singing, table recommended numerous."