1. Economically, Dongwu has a relatively superior geographical position, and the agricultural and sideline industries in the land of plenty are relatively developed. 2. Politics: Although Wu Dong's political situation was unstable, there was no stronger family to replace Sun Shi's political power, while Cao Wei monopolized Sima's power and was eager to try Cao Wei's political power. 3. Militarily, Dongwu rarely took the initiative to fight, but in Shu, on the contrary, it was defeated several times and its national strength was greatly damaged. 4. Because Jiangdong is the birthplace of Wu Dong, with favorable weather, favorable geographical conditions, friendly people and a solid foundation, Wu Dong Group has basically been defending Jiangdong with a conservative attitude, and the threat to Cao Wei is not the first, but Shu Han is different. The slogan of the founding of the People's Republic of China was to revive the Han Dynasty and attack Wei from Shu several times. For Cao Wei, destroying Shu Han is the first thing.