In the last years of Hongwu, Nanjing was undercurrent. Li Jinglong, Duke of Cao, was trusted by the emperor's eldest grandson Zhu Yunwen, but he was deeply trapped in the dilemma of cutting down the vassal vassal. The Battle of Jingnan suddenly broke out, and he was ordered to take charge of the Southern Army in the face of danger, facing the brave and capable King Zhu Di of Yan. From the court games to the defeat on the battlefield, this book uses the perspective of this "sycophant" to reveal the dust-laden failures and struggles in the power change in the early Ming Dynasty.