In the history of China, Henan has a high position, because it is the core of the Central Plains in the history of China. Historically, Henan was not only economically prosperous, but also densely populated, which was a battleground for many dynasties. In history, rulers of many dynasties chose to build their capital in Henan. However, it is very strange that after the Song Dynasty, all dynasties did not establish their capital in Henan. In fact, the reason why the capitals of the past dynasties were not in Henan after the Song Dynasty was mainly because the state rulers had more opportunities to choose the capitals after the Song Dynasty.

First, the historical position of Henan This place is very important in the history of China, and it has often become the capital of a certain dynasty. Because Henan is densely populated, it is located in the core of the Central Plains. It is precisely because of this important geographical location that Henan has experienced many wars in history.

Second, the reason for not choosing Henan as the capital After the Song Dynasty, most rulers did not choose to build their capital in Henan, mainly because Henan experienced too many wars in previous dynasties. Because many places have been seriously damaged, naturally its capital conditions and environment are no longer suitable for being the capital of a country. In addition, this place in Henan often suffers from natural disasters and plagues, so many rulers have to regard other places as the capital of a country. In addition, after the Song Dynasty, the rulers of a country will be more casual when choosing the capital of a country. For example, during the Southern Song Dynasty in China, the rulers randomly designated Lin 'an as the national capital. In the Yuan Dynasty, Dadu was chosen as its capital, and in the Ming Dynasty, the ruler made Nanjing its capital.

Thirdly, after the Song Dynasty, the reason why the rulers didn't build their capital in Henan was mainly because Henan didn't have the environment and conditions of a national capital at that time.