1. The rear was unstable, and Ma Teng and Han Sui in Xiliang were constantly on the move.

2. Yuan Shao had just been neutralized, and the Hebei regions needed to be managed and restored.

3. The roads in Xichuan were difficult to travel, so it was not advisable to go deeper.

4. The lord of Xichuan was mediocre at the time, and Cao Cao thought that after destroying Liu Bei and Sun Quan, he would be able to destroy Xichuan without much effort.

5. To the north of Xichuan, there was the Hanzhong barrier, a heavenly danger to be defended.

Cao Cao (155 years - March 15, 220 ), the character Meng De, a Jili, the small character A Concealer, Pei State Qiao County (present-day Bozhou, Anhui Province) people. He was an outstanding statesman, militarist, literary scholar and calligrapher at the end of the Eastern Han Dynasty, and the founder of the Cao Wei regime in the Three Kingdoms.

Cao Cao was skilled in military tactics and poetry, expressing his political ambitions and reflecting the suffering of the people at the end of the Han Dynasty, with a majestic, generous and melancholic spirit; his prose was also clear and tidy, opening up and flourishing Jian'an literature, leaving behind valuable spiritual wealth for future generations, known as the Jian'an Bone of Style, which was evaluated by Lu Xun as the "grandmaster of the reformed essay". At the same time, Cao Cao is also good at calligraphy, especially Zhang Huaiguan in the Tang Dynasty, in the "book breaks" as "wonderful products".