The time traveler Nan Feiyan established himself in the Qin Dynasty with his academic psychology. He first broke through Xianyang's heart-locking conspiracy and revealed the identity of Qin Gongzi Chengyu (split personality) as the sect leader. Later, he went deep into the Lishan Mausoleum, cracked the large-scale mental control of prisoners, and uncovered the undercurrent of collusion between Qin and Chu. He and Lu Qingque solved the entanglement of their life experiences, used psychological games to defeat Cheng Xi's crazy plan, and acted as the emperor's mentor, tightly binding his personal strategy to the fate of the Qin Dynasty to protect the stability of the empire.
