What book does an armchair strategist come from? Here is a detailed answer.

1, from Historical Records Biography of Lian Po and Lin Xiangru, records that Zhao Kuo, the son of Zhao She, a famous soldier of Zhao State in the Warring States Period, studied the art of war when he was young, but his father could not beat him in military affairs. Later, he succeeded Lian Po as Zhao Jiang in the Battle of Changping. I only knew how to act according to the art of war, but I didn't know how to be flexible. As a result, I was defeated by Qin Jun.

2. Story: During the Warring States Period, Zhao Kuo, the son of Zhao She, a famous Warring States soldier, was proficient in the art of war and was eloquent in the use of force. Even his father can't beat him, and he thinks he is invincible. Zhao thinks he is an armchair strategist. Later, when Zhao She died, Zhao Kuo took Lian Po's place. Lin Xiangru and others strongly opposed it. Zhao Wang insisted that Zhao Kuo lost 400,000 soldiers in the battle of Changping.