Li Er was reborn as Chongzhen who was hanged on Meishan Mountain. He knew that the Ming Dynasty was difficult to return and Li Zicheng was about to destroy the city, so he decided to continue the country. He pretended to propose peace, screened out Zhu Chunchen and other surrender factions, and sent Wang Cheng'en out of the city to negotiate and stabilize Li Zicheng. During this period, he gathered more than a thousand people from the Forbidden Army and Jinyi Guards. He also plundered Zhu's property to gain pay and stabilize the morale of the army, and set up substitute soldiers to deceive the enemy. He ordered the prince to lead a team to break out from Xizhimen with the help of Li Guozhen's troops, and he mingled among them. In the end, everyone escaped from Shuntian Mansion and headed for Tongzhou. When Li Zicheng noticed something strange, they had successfully escaped.