Specifically:
North: the south bank of Weishui River in the north of Longnan City, Gansu Province, and Hanzhong in the south of Shaanxi Province, excluding Shang Yong (Zhushan County) in Wei Xing County (Yunxian County, Hubei Province) which was originally in Hanzhong.
East: up to now, Badong County in western Hubei, Fuling in Chongqing, and the southeast is a part of Guiyang City in Guizhou Province in the east.
South: The southeast is similar to the border of Yunnan Province today, except that a large area in the southwest is Myitkyina, Myanmar today.
West: It is mountainous and dangerous, limited to the vicinity of Sichuan Basin, and the west does not include Jiuzhaigou and Marcand today.
Extended data:
In 222, Liu Bei avenged Guan Yu and was defeated in Yiling. If you lose the elite of Shu Han, you lose Jingzhou. After Liu Bei's death, the tribes in southern Yizhou rebelled, which was a weak period in the history of Shu, with a total land area of about 700,000 square kilometers.
In 225, Zhuge Liang led the army to fight against barbarians and crusade against Lv Yong and Meng Huo. That autumn, he put down all the chaos and stabilized the southern border. At the same time, we formed an alliance with Sun Quan to stabilize the eastern border, actively develop production and prepare for the Northern Expedition. Up to now, the Shu-Han border has been stable to extinction, with a total land area of about 6.5438+0.06 million square kilometers.
The border between Shu and Han reaches Hanzhong in the north, facing Cao and Wei across the Qinling Mountains, bordering Wuxia, Baxian and Soochow in the east, India and Myanmar in the west, occupying parts of eastern Myanmar and Laos and northern Vietnam in the south.
It occupies most of Yunnan, Sichuan and Guizhou provinces, Shaanxi, southern Gansu, northwestern Guangxi, northeastern Myanmar and northwestern Vietnam, and a small part of northern Laos.
References:
Baidu Encyclopedia-Han Shu