The relation between politics and culture has some hints to that of relation between politics and religion in Chinese context. In the Xia, Shang and Zhou Dynasties, ancient religion was employed as means of culture. Various thinkers at Spring and Autumn, and Warring States explored different ways in carrying out their respective cultural missions, paving the base for their legitimacy of politics. In Qin Dynasty, the doctrine of Legalist was respected as means to cultural life, and at the incipience of Han Dynasty Wu Wei of Daoism was introduced to political culture. But these means were ill in efficiency as to legitimize political power. Only the doctrine of Confucian Moral Rule based on filial piety can provide valid ideology. So Han Wu Di chose the Confucian doctrine as the paramount one above all others in his politics, leading the birth of religious Confucianism. This religious Confucianism consists of Confucian doctrines inherited from ancient religion rituals and rites for funerals. The cultural choice at the interval of Qin and Han Dynasties constitutes the orientation for ancient Chinese culture.