Those counties and cities included in northern Guanzhong

As shown in the picture, northern Guanzhong mainly refers to the area located on the Weibei Plateau, that is, south of the Beishan Mountain System.

Mainly Fuping, Pucheng, Dali, Heyang, Chengcheng, Baishui, Hancheng, Sanyuan, Chunhua, Liquan, Qianxian, Yongshou, Xunyi, Binxian, Changwu, Qishan, Linyou, Fengxiang, Qianyang, Long County and Tongchuan City, etc.

Guanzhong refers to the "Four Passes", namely Dongtong Pass (Hangu Pass), Xisan Pass (Dazhen Pass), Nanwuguan (Languan Pass), and North Xiaoguan Pass (Jinsuoguan Pass) ). The current Guanzhong area is located in the central part of Shaanxi Province, including five cities and one district: Xi'an, Xianyang, Baoji, Weinan, Tongchuan, and Yangling, with a total area of ​​55,623 square kilometers and a population of 23.92 million.

Guanzhong is surrounded by the Qinling Mountains in the south, with the Wei River running through it. There are natural terrain barriers on all sides, which are easy to defend and difficult to attack. Since the Warring States Period, there has been a saying of "a country with four fortresses". Therefore, Zhang Liang of the Han Dynasty used "Golden City Thousand Miles" to summarize the advantages of Guanzhong and persuade Liu Bang to make Guanzhong his capital. During the Warring States Period, Zhang Yi presented the plan of "Lian Heng" to King Hui of Qin, and praised Guanzhong for its "fertile fields, prosperous people, thousands of chariots, fighting for hundreds of trades, thousands of miles of fertile fields, and abundant reserves" and said, "This The so-called Tianfu means the most powerful country in the world. This was more than half a century before the Chengdu Plain received the title of "Land of Abundance". This is because after the construction of the Zhengguo Canal in the Warring States Period, Guanzhong became a geomantic treasure land rich in products and where emperors established their capitals.