1. In ancient times, Guanzhong was called the land of abundance. From the Zhou Dynasty to the Tang Dynasty, Xi, Shaanxi Province has been the capital of the whole country. Haojing in Zhou Dynasty, Xianyang in Qin Dynasty and Chang 'an in Han and Tang Dynasties all refer to Xi 'an in Shaanxi today. The place where Xi 'an is located is called Guanzhong, not Yumenguan, but a plain formed in the Weihe River Basin, because the economic center of gravity at that time was still in the north, and the land of Guanzhong was a rare plain in the middle of the north, suitable for living and developing the economy, so the earliest land of abundance should be Guanzhong area including Xi 'an.
Second, Xi 'an's political economy is greater than humanities. As an ancient capital, Xi 'an bears more economic and political functions. Therefore, the propaganda in humanities is not in place, that is, Beijing and Shanghai are very similar today. If you think that Shanghai is more about economy, but politics is definitely Beijing, and culture is Beijing, so although Shanghai is advanced in science and rich in humanities, it is not outstanding. This is also a gain and loss.
Third, Chengdu was remote in ancient times, more like a country. In ancient times, Chengdu was more like a country within a country because of its steep peaks and remote geographical location. Now, after Li Bing and his son built Dujiangyan here in the Spring and Autumn Period and the Warring States Period, Chengdu has been gradually developed, and then it has become a fertile and stable residence, just like the land of abundance where the gods in the sky live. Therefore, the land of abundance later refers not to economic prosperity, but to a paradise-like living condition. Therefore, after the Tang Dynasty, the capital moved to the south, and Chengdu in the southwest naturally became a new generation of land of abundance.