This novel should be the library of heaven. The protagonist is Li Fei, a modern man who crossed into a similar ancient world and became a false eunuch. The cultivation in this world is very strict, with strict grades and regulations. The protagonist's cultivation qualification is very high. After being discovered by the queen, he was asked to seduce the emperor's favorite concubine. The protagonist has a golden finger and can learn all kinds of skills and knowledge through the Heaven Library. The main achievement method of the protagonist is "Phoenix Dance for Nine Days" and the auxiliary achievement method is "Zi Mufeng", which can control and manipulate other achievements. In the process of cultivation, the protagonist also encountered various challenges and dangers.