1, the armchair strategist is Zhao Kuo. This story comes from Sima Qian's Historical Records, Lian Po and Biography of Lin Xiangru. Zhao Kuo was a native of Zhao in the Warring States Period and the son of the famous Zhao Zhao She. Although Zhao Kuo is familiar with the art of war, he lacks experience and doesn't know how to be flexible. He will only be an armchair strategist.

2. During the Warring States Period, the famous Ma Su of Zhao defeated the invading Qin Jun and was promoted to Shangqing by King Huiwen of Zhao. Zhao She's son, Zhao Kuo, has been familiar with the art of war since he was a child and loves to talk about military affairs. Most people can't beat him. Therefore, Zhao Kuo is very proud and thinks he is very powerful. Zhao She was worried about him, thinking that he was just an armchair strategist. In 259 BC, when Qin Jun attacked, Zhao She was already dead, and Lian Po was mainly responsible for commanding the whole army. The State of Qin sent people to Zhao to spread the news of "General Zhao Kuo, the son of Zhao She, whom Qin Jun was most afraid of". Sure enough, the prince of Zhao was deceived and sent Zhao Kuo instead of Lian Po. As a result, Zhao Kuo would only go to war in accordance with the provisions of Sun Tzu's Art of War, resulting in the annihilation of more than 400,000 Zhao troops and his own death by archers in Qin Jun.