Why didn't a big country appear in ancient China?

It is inaccurate to say that there was no integration of politics and religion in ancient China. In fact, there was a relationship of "politics based on education" in ancient China. From the Spring and Autumn Period to the early Han Dynasty, Confucianism, Taoism and Taoism were used by rulers of all countries. After Hanwu, the Central Plains regime relied on Confucianism to build the country and maintain stability. Therefore, China has not completely got rid of the phenomenon of the unity of politics and religion, but a similar relationship between politics and religion.