He was one of the few people in ancient times who understood the benefits of "gathering people's thoughts" and had a democratic spirit. The purpose of brainstorming is to be realistic and practical. From what he said in Longzhong and Yizhou, we can see that his spirit of seeking truth and pragmatism is consistent. This can solve the mystery of why Longzhong’s analysis of the situation was so accurate. In Longzhong, he was very familiar with Cao Cao, Jiangdong Sun Quan, Jingzhou Liu Biao, Yizhou Liu Zhang, Hanzhong Zhang Lu, etc., so he could foresee that the "full power" could be realized, so he could propose "building Sun Quan well outside and practicing power inside". Waiting for a series of winning principles and policies, because he always "reasons without giving up", studies and analyzes problems, and brainstorms.