Ouyang Xiu, a writer in the Northern Song Dynasty, was deeply impressed by the social unrest in the Five Dynasties. He compiled the History of the Five Dynasties (later called the New History of the Five Dynasties), specially compiled the Biography of Lingguan, and made a preface, summarizing the historical lessons of Li Aiyue, the son of Emperor Tang Zhuang, who caused the country to perish. It is pointed out that "the misfortune of a husband often accumulates in ignorance, while wisdom and courage are trapped in drowning", warning future generations to take a warning. This sentence tells a profound philosophy: disasters can be accumulated, and people with both wisdom and courage can be confused by what they like. Only by always being vigilant and not playing with things can we be invincible forever.