不护细行

Explanation: Refers to not pay attention to section. 　　Source: A phrase from the "book tour mastiff": "Do not boast fine line, and finally tired of Dade." San Guowei Cao Pi "Letter to Wu": "View of ancient and modern writers, class does not protect small banks, were seldom able to own section." 　　Examples: Scholars are light Xia, neutron charge, came from a further ~. ★ "South Shizhang Xu Biography"