ㄑㄧㄡㄏㄠˊˊㄈㄢˋqiūháo‑wúfàn

秋毫无犯
  1. 絲毫侵犯形容嚴守紀律 部隊紀律嚴明秋毫無犯」。

lit. not harming a new feather (idiom)​; not commit the slightest offense against the people (of soldiers)​, would not hurt a fly