The late Emperor of Dayin died violently, his seal disappeared, and the young emperor ascended the throne; a fragment of "Da Yin Mountains and Rivers" revealed the centuries-old disadvantages of the dynasty: the northern border pass was wrongly painted, the fields south of the Yangtze River disappeared, the imperial capital's culvert was out of control, and the ancient road post was lost. What Xiao Chengyan wants to regain is not only the imperial power, but also the entire world that has been tampered with by powerful officials, aristocratic families and military towns.
