An example of the futility of reading.

During the Warring States Period, Zhao Kuo, the son of Zhao She, a famous soldier of Zhao, studied the art of war. When he was young, he also had high attainments in the art of war. Later, he succeeded Lian Po as Zhao Jiang in the Battle of Changping. All I know is to act according to the art of war, and I was defeated in the end. Just talk on paper-be an armchair strategist

There is a scholar named Liu Yuchong, who is withdrawn and likes to talk about the ancient system. Once he accidentally got an ancient art book and read it on his desk for a year, claiming that he could command a hundred thousand troops. At this moment, some people gathered to rebel, and Liu Yuchong trained a group of village soldiers to suppress them. As a result, the whole team was defeated and he was almost captured himself. Later, he got an ancient water conservancy book and read it for a year, claiming that a thousand miles of barren land can be turned into fertile land. Government officials asked him to carry out experiments in a village. As a result, as soon as the ditch was dug, it rained heavily. The flood flooded into the village along the river and almost all the villagers were drowned. Since then, Liu Yuchong has been unhappy. Every day he always walks alone in the yard, shaking his head and saying to himself, "Did the ancients bully me?" Soon, he died of depression.