What is the concept of national religion?

Nation and religion are two different concepts. A nation is formed by people in history with the same language, the same region, the same economic life, the same psychological quality and the same stable culture. Belongs to the historical category. Therefore, nation cannot be equated with religion. However, there is a connection between the two. Since the emergence of ethnic groups and religions, there is no ethnic group that is not associated with religion, but the degree of association is different. Some ethnic groups basically believe in one religion as a whole; Some people believe in this religion, while others believe in that religion. In some ethnic groups, most people are not religious, and a few people are religious. As a social ideology, religion has exerted different influences on the history, culture and customs of many ethnic minorities. Some contents and forms originally belonging to religion have become the customs and habits of some ethnic minorities through long-term historical development.