The dynasties in Chang 'an, the capital, were relatively strong. What is the basis of this statement?

Introduction: This is not absolute. The regime with Chang 'an as its capital was really strong in Qin, Han, Sui and Tang Dynasties. But there are also short-lived regimes, such as pre-Zhao, pre-Qin, post-Zhao and Western Wei. Almost all dynasties before the Song Dynasty chose Chang 'an as their capital, which has a great relationship with the richness, climate, geographical environment and geomantic omen of Guanzhong Plain where Chang 'an is located. In addition to the Han Dynasty, the origins of the founding monarchs of Zhou, Qin, Sui and Tang dynasties are closely related to Guanzhong. From the Western Zhou Dynasty, Qin and Han Dynasties to Sui and Tang Dynasties, Chang 'an was the first choice to build its capital, so Chang 'an was known as the ancient capital of thirteen dynasties. There is no necessary causal relationship between whether the regime is strong or not and where the capital is, otherwise there will be no dynasty to build Chang 'an after Sui and Tang Dynasties.

Chang 'an on the Silk Road was once the most prosperous international metropolis in ancient times, with a population of several million. More than 3,000 years' history of building a city, more than 1,000 years' history of building a capital, and the blessing of the prosperous times of Qin, Han, Sui and Tang Dynasties have made Chang 'an famous. Nine doors of heaven reveal the palace and its courtyard, and the coats of many countries bow to the pearl crown; The majestic Chang 'an has made the world admire and miss it. Together with the legend of Feng Shui in Long Mai, thirteen ancient regimes were established here. This thousand-year-old ancient capital witnessed the prosperity of the prosperous dynasty and the decline and demise of this regime with its capital.

Guanzhong, as the birthplace of a powerful dynasty, will naturally build its capital Chang' an after its rise to unify the world; Natural environment, affluence and relatively closed environment naturally become the first choice for capital construction.

In fact, it has always been said that Chang 'an is the first choice as the capital. In fact, it is very important, because the places where these dynasties began were all in Xixiang. We all know that the ruling centers of the Xia Dynasty and Shang Dynasty in ancient times were in Henan and Hebei, and Song Dynasty, the capital of Shang Dynasty, was also in Henan. The Zhou dynasty ruled in Xiqiao (as shown in the following figure), so of course, the address of the capital after the Zhou dynasty destroyed the Shang dynasty should be in its own territory-Haojing (Chang 'an). When Qin was sealed, it was Zhou's hometown after Zhou moved. After the Qin Dynasty unified the whole country, its capital was naturally Xianyang (near Chang 'an). Not to mention the Sui and Tang Dynasties, the royal family started from Guanlong Group. Therefore, it is better to understand that its capital is in Chang 'an.

In ancient times, the climate in Guanzhong was very humid and rich. Qinchuan, 800 Li, made the Zhou Dynasty and the first two dynasties of the Qin Dynasty a land of abundance. Moreover, the Guanzhong Plain is located at the junction of Qiang and the people are brave and tenacious. In the east, Hanguguan blocked the eastern princes, and in the north, it was bordered by conference semifinals to get the convenience of horses. The rich Bashu in the south can be described as impregnable. Coupled with the later traffic water system, the structure of eight waters around Chang' an was formed. Naturally, you can become a hegemon, and you can attack and retreat in the capital Chang 'an: you can go out of Qinchuan and overlook the Central Plains, and you can rely on Hanguguan to protect yourself. Therefore, in history, the separatist regimes of Zhao, Qin and Hou Qin also established their capitals in Chang 'an, which is the reason.

The legend of being located in Long Mai and the spirit of the son of heaven were also the reasons why the dynasty took Chang 'an as its capital. The perimeter of Chang 'an is not conducive to defense, forcing the Jiandu dynasty to take offense instead of defense to achieve success.

The attention paid by dynasties to the capital: geomantic omen, Long Mai, geographical environment, location, traffic, climate, humanities and so on. In ancient times, the theory of geomantic omen was very popular in both feudal society and earlier slave Xia, Shang and Zhou dynasties. What's more, it is necessary to choose Long Mai to protect the country through geomantic omen. ? Long Mai? Feng Shui refers to mountains, and there are no mountains in the plain. Rivers are an important factor affecting geomantic omen. So the rivers on the plains are also called Long Mai. China's major Long Mai originated in the northwest. Mountain dragon originated in Kunlun Mountain, while water dragon originated in Qinghai-Tibet Plateau. China recognized the three Long Mai as shown in the following figure, so the earliest Chang 'an, surrounded by mountains and rivers, happened to be the core of central Long Mai, so it is understandable that most dynasties with its capital Chang 'an were powerful and burly. However, Chang 'an is located in the south of Weihe River as a whole, which is not impregnable. Therefore, in order to ensure the safety of the capital, the dynasties that built Chang 'an as the capital were basically both offensive and defensive.

Although Chang 'an has various advantages, it still can't let the short-lived separatist regimes such as former Zhao, former Qin, later Qin and Western Wei achieve hegemony.

Chang 'an is the core of Long Mai in Central China, where Qinchuan is rich in 800 miles, and the surrounding Tongguan, Sanguan, Xiaoguan and Wuguan seem to be impregnable; However, even Chang 'an, as powerful as the Tang Dynasty, was breached six times, so whether the dynasty with its capital Chang 'an is strong or not depends on its own strength. Timing, location and people are indispensable. Chang 'an can't make all dynasties with Chang 'an as their capital strong. Otherwise, Chang 'an, known as the ancient capital of the 13th Dynasty, has established 13 powerful dynasties, which is obviously absurd. Zhao Qian, Qian Qin, Hou Qin etc. The capital of Chang 'an was short-lived regime, which lasted for decades, especially after the later Qin Dynasty was destroyed by Emperor Wu of Song. Emperor Wu of Song captured Tongguan, Wang Zhene besieged Chang 'an, and Yao Hong, the late Qin emperor, was executed after the national surrender, and the Yao family of the late Qin royal family was wiped out. Although the Western Wei Dynasty was short-lived, it was replaced by the Northern Zhou Dynasty, which was usurped by Emperor Wendi of Sui Dynasty at the time of reunification. With the support of Guanlong Military Group, Sui and Tang Dynasties once again bloomed in Chang 'an.