Doctor of Modern Qin and Han History, proficient in the politics, military, and folk customs of the late Qin and early Han Dynasties. He has a calm and tolerant personality, a scholar's character, and survival wisdom. In the early days, he was obsessed with changing the fate of the Qin Dynasty, and took the initiative to get to know historical figures and participate in historical events. After many setbacks, he gradually recognized the inertia of history, and changed from a "participant" to a "helpless witness." There was clear growth and psychological transformation throughout the process, which is the core clue that connects the entire troubled times.