Traveling through the late Ming Dynasty, he became Emperor Chongzhen's personal eunuch, and with the help of the system, he helped Emperor Chongzhen survive and revive the Ming Dynasty. On the top floor of the library in the depth of winter, the handwriting of "Collection of Memorials of the Chongzhen Dynasty" gradually blurred in front of Wang Hao's eyes. This 36-year-old scholar who specializes in the history of the fall of the Ming Dynasty has been hunkered down in yellowed historical materials for 72 hours. The fluorescent screen stayed on the shocking record: "In the fourteenth year of Chongzhen, the defeat of Songjin destroyed the last elite of the Ming Dynasty, and the nine-sided defense collapsed." When he clicked on the high-definition scan of "Chongzhen's Self-Hanging Edict" from the Palace Museum with trembling hands, his heart suddenly cramped - in the vision, bright yellow clothing belts fluttering on the crooked neck trees in Meishan appeared, and there seemed to be a mournful cry in his ears: "I have been mistaken!"