When the moonlight of the prosperous Tang Dynasty shines into the dark corners of officialdom, Di Renjie's figure becomes the most touching footnote. This is not only a collection of solved cases, but also an ukiyo-e painting of the Tang Dynasty: from the cunning of market traders to the machinations of princes and nobles, from the absurdity of rural anecdotes to the dangers of court battles, each case is a mirror that reflects the good and evil of human nature and the wrinkles of the times.