The "Preface to the Biography of Lingguan in the History of the Five Dynasties" quotes Shangshu as saying: "Being full will cause losses, but being modest will gain.".

In the "Preface to the Biography of Lingguan", the author quoted the words of "Shangshu" and compared it with the historical facts: fullness will cause harm, modesty will benefit. There is a famous saying: "Fullness brings harm, modesty benefits"; "Sorrow and hard work can rejuvenate a country, but leisure and hesitation can destroy one's life"; "Husband's misfortune is often accumulated in the slightest, but wisdom and courage are trapped in the drowning."

《 In the "Preface to the Biography of Lingguan", the author quoted the words of "Shang Shu" and compared it with the historical facts: fullness will cause harm, modesty will benefit. The famous saying "fullness brings harm, modesty benefits"; "worry and hard work can rejuvenate a country, but leisure and hesitation can destroy one's life"; "Husband's misfortunes are often accumulated in the slightest, but wisdom and courage are often trapped in the drowning."

Enlightenment : Be modest and prudent, and avoid being complacent; be prepared for danger in times of peace, and don’t be greedy for enjoyment; be on guard against minor changes, and don’t indulge in things that make you unable to extricate yourself.

The citation method is used here. That is to quote famous quotes and demonstrate them theoretically. Pride and complacency are the enemies of success. As a king, pride will lead to extravagance, lust for pleasure, and neglect of government affairs.

From this sentence, the author further elaborates and concludes that "worry and labor can rejuvenate a country, and leisure and hesitation can destroy one's life." It is inspiring and enlightening.

"The Biography of Lingguan" is a combined biography in the "New History of the Five Dynasties". It records the deeds of actors (the title of ancient musicians and actors) Jing Xiu, Shi Yanqiong, Guo Menggao and others.

This article, through a detailed analysis of the rise and fall of the Later Tang Dynasty during the Five Dynasties period, deduces: "worry and labor can rejuvenate the country, and leisure and hesitation can destroy the body" and "misfortunes are often accumulated in the subtle, but wisdom and courage are often trapped in The conclusion of "drowned" shows that the rise and fall of a country does not depend on destiny but on "human affairs". It serves as a warning to the rulers of the Northern Song Dynasty at that time to learn lessons from history, be prepared for danger in times of peace, take precautions against the slightest, and guard against arrogance, extravagance and indulgence.