As a famous ancient capital in the history of China, why did Luoyang become a third-tier city?

Chinese civilization has lasted for more than 5,000 years. Xi, Nanjing, Beijing and Luoyang are the four recorded ancient capitals in China. But there is one place, which is not only the most cultural city in the world, but also the starting point of the Silk Road. It has the reputation of the city of peony and the title of the ancient capital of the thirteenth dynasties. This place is Luoyang, located in the Yellow River belt of Henan Province. However, Luoyang, the ancient capital of the Nine Dynasties, began to decline after the Tang Dynasty. Why?

However, with the development of history and the improvement of productivity, the population of China has gradually increased. By the Han Dynasty, the population of the whole country had exceeded 50 million, which means that if Chang 'an and Luoyang want to become imperial capitals, they must expand to an unprecedented scale and carry more people, which is beyond the carrying capacity of Chang 'an and Luoyang. ?

The Beijing-Hangzhou Grand Canal was abandoned, and Luoyang's traffic advantage declined. After the middle of the Tang Dynasty, our time was divided into different regions, which led to the gradual destruction of the Beijing-Hangzhou Grand Canal, and the demise of the Tang Dynasty directly led to the demise of this place. Later generations tried to save this place, but it was abandoned for too long and lost the value of this city. On the contrary, nearby Kaifeng took the opportunity to rise. ?

There are frequent wars in the north, and Luoyang's economy is declining. Since Wei, Jin, Southern and Northern Dynasties, there have been frequent wars in the north, the population began to move south for the first time, and the economy in the south has developed. After the Anshi Rebellion, Luoyang was seriously damaged by the war, and the population moved south for the second time. In the Song Dynasty, the economy of the south surpassed that of the north. Later, the Southern Song Dynasty took Lin 'an as its capital, and the north was occupied by ethnic minorities for a long time. Luoyang withdrew from the historical stage.

What kind of tourism can Luoyang develop besides history now? The Soviet Union established tractor factory, bearing factory, mining machinery factory and thermal power plant in Luoyang. Later, the projects of copper factory and diesel engine factory were given to Luoyang. But none of the projects have made a breakthrough, which has promoted the economy of Luoyang.

Luoyang has been trying to get rid of the shadow of heavy industry and only wants to develop light industry; However, contrary to expectations, heavy industry is getting heavier and heavier, and light industry is getting lighter and lighter. This is the sorrow of Luoyang's development in recent years. ?

But now, if the city wants to develop, it can't just rely on a single industry to drive the economy, which will only make the city look too complacent. For the long-term development of a city, it is very important to enhance the economic strength of other industries.