To know why there is such a saying, we must find out who said it and under what circumstances. This sentence was first recorded by Ouyang Zhigong in Shu Police Record in the late Ming and early Qing Dynasties, and similar statements can be traced back to Zhou at the earliest.
Shu refers to Sichuan. Sichuan is a basin, located in the southwest of China, with a suitable climate since ancient times? Land of abundance? Good name. During the Three Kingdoms period, Zhuge Liang asked Liu Bei to take down Sichuan before discussing the world situation with Liu Bei, so that he could compete with Cao Cao and Sun Quan. And can recuperate, but also gave Liu Bei the opportunity to develop in many directions. It can be seen that the geographical location of Sichuan is important, and it is precisely because of this that Sichuan has become a land of warlord conquest since ancient times. It is precisely because Sichuan is a basin that its geographical features are a natural separatist unit. During the war, it can not only be used as an important place for grain and grass and a rear area, but also as an escape place.
Sichuan's geographical environment is complex and mountainous, and the roads are not easy to walk. If foreign enemies attack, it is very difficult to capture. Therefore, some political parties and insurgents targeted Sichuan very early, which made Sichuan have such a statement. During the Song Dynasty, due to the weak rule of the Song Dynasty over Shu, Shu was targeted by other regimes. China was reunified by the Yuan Dynasty for several decades, and then the peasant uprising was caused by the ruling class's harsh treatment of the people and their wanton enjoyment. Zhu Yuanzhang was one of the many uprising troops. After the Yuan Dynasty was destroyed, the power in Sichuan was the Xia Dynasty, and Zhu Yuanzhang sent people to attack and then unified the Ming Dynasty. After Manchu Banners entered Shanhaiguan, Sichuan fell into war again, and it was not until the Kangxi period that Sichuan was stable again.
By the end of the Qing Dynasty, the inaction of the Qing government in building railways in Sichuan caused people's protests again, and then the Revolution of 1911 broke out in Sichuan. However, Liu Bang started in Sichuan and then had the Han Dynasty. An Shi Rebellion Emperor Taizong escaped a bullet by hiding in Shu; During the Anti-Japanese War, Sichuan was also the rear area of our country, and the Kuomintang government was in Chongqing. It can be seen that Sichuan, because of its special geographical location, has always been an important witness to China's history, but the subject's statement has historical limitations.