Why did Chang'an lose its status as the capital after the Tang Dynasty. Chinese History

1. The irrigation system in the Guanzhong area was destroyed during the war with Tibet and was no longer suitable for establishing a capital.

2. The empire is no longer strong enough to eliminate the threat to Guanzhong from the nomadic peoples in the southwest, northwest, and north. With the capital here, the country may be destroyed at any time. (Taizu of the Song Dynasty also once said that Kaifeng was not suitable to be the capital. When the Song Dynasty could eliminate border troubles, the capital would still have to be moved to Luoyang or Chang'an. Unfortunately, the Song Dynasty was getting weaker and weaker, and his wish was not realized)

3. Jiangnan has been fully developed in the Sui and Tang Dynasties. Jiangnan’s products, water transportation, salt and iron have become the backbone of the country. Guanzhong is no longer the economic center, and is deep in the interior, far away from the economic center. The capital of Chang’an is too high, and the logistics cost of supplying the capital is too high. After the Yuan, Ming and Qing Dynasties established their capital in Beijing, the Beijing-Hangzhou Grand Canal was an important economic factor as it could conveniently transport materials from the south of the Yangtze River to the capital. The reason why Beijing was the capital of the Yuan and Qing Dynasties was that it was close to the base areas of the Mongols and Manchus, making it easy to move in and out. The Ming Dynasty aimed to check and balance the power of Mongolia, but the border troubles could not be completely resolved. Finally, it was a tragedy when it came to Yingzong, and it was a complete tragedy when it came to Chongzhen.

4. There may also be climate reasons. For a long time, Central Asia and even the Western Regions and western China have become increasingly dry (or in other words, the population is increasing and water consumption is too large). When Lop Nur is dry, Juyanhai After drying up, Loulan and other ancient countries turned into deserts. Chang'an is located in the northwest, so it will naturally be affected and dragged down.

5. The overland Silk Road is gradually declining (in the Song and Ming dynasties, there was no control over the Western Regions, and the Silk Road was not guaranteed). After the Song Dynasty, with the development of navigation technology, exchanges between the East and the West Focusing on maritime transportation, Chang'an is no longer the starting point and focus of communication with the West.

One more thing, I am heading towards Beijing as the capital, firstly because it is close to Big Brother, in case of the US imperialism... Big Brother can help me (and get a vote by the way); secondly, this place is It is close to the northeast of the old industrial base (developed by the little devil); the third is that the sea power is weak, and there is an inland sea and the Bohai Sea sanitation, which makes it easy to go to the sea, but it is not so easy for enemies from the sea to come in; the fourth is related to the emperor's Feng Shui, as the Buddha said: it cannot be said.