秉要执本

Explanation: Bing: executive, holding; to: important; the: fundamental. Means to seize the vital and fundamental, 　　Usage: Joint type; as predicate, object; means to seize the vital and fundamental 　　Source: Han Ban Gu "Han Dynasty History": "Taoist school, built out of historian, ancient and modern historical record of success or failure of the survival of good and bad fortune Road, then known to the implementation of the Bing."