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1627, August 24. Ming Dynasty ushered in her last emperor. Emperor Chongzhen Zhu Youjian stood on the imperial steps of Jianji Hall and accepted the worship of hundreds of officials. Just as the enthronement ceremony was progressing to the last stage, the late Emperor Zhu Youxiao suddenly appeared at the door of the hall. "Chongzhen, don't ascend the throne first, let me deceive you first!!" The firearms engineer came to the Ming Dynasty with the memory of his previous life. What changes will he bring to this crumbling building?