《三国志·蜀书·杜周杜许孟来尹李谯郤》
有人认为，蜀国与吴国原本是友邦，应该可以投靠吴国。有人认为南中七郡，高山险阻，容易守卫，可以奔向南方。
或以为蜀之与吴，本为和国，宜可奔吴；或以为南中七郡，阻险斗绝，易以自守，宜可奔南。
Some believed that Shu and Wu were originally friendly nations and should seek refuge in Wu. Others believed that the seven counties in southern China were mountainous and险阻, easy to defend, and could go south.