Why was Guanzhong area one of the most developed and prosperous areas in China during the Han and Tang Dynasties?

politically, it is stable. Guanzhong area is the political center of the whole country, and the capital Chang 'an (that is, Xi 'an) is here. Economically, the developed economy is the national trade center, and the "Silk Road" has been opened successively. In terms of culture, cultural prosperity, cultural integration, and abundant talents provide spiritual support; Ideologically, open-minded, inclusive, compatible with the ideas of all ethnic groups, learn from others; In terms of policies, active foreign trade policies and ethnic policies, favorable development policies, and encouraging foreign trade; In terms of transportation, a stable political environment, developed transportation, and smooth waterways and land; Geographically, Guanzhong plain has fertile land and pleasant climate; Historically, dynasties accumulated and ruled stably; In other respects, the rulers of the dynasty were more enlightened in their ruling policies.