鞭辟向里

Explanation: Means in-depth analysis, so close to the innermost layer. Describe the search for a thorough, in-depth microscopic. 　　Source: Ming Wang Shou-ren "Send Zou Qian Book": "realize justice everywhere is said about it not, as long as the final drop, which is rather based on hearsay evidence, Zongling whip provision to the inside, also in conscience with the holy doors of power, yet every Yichen . "