Why did the Jin Dynasty call itself a Han Chinese, but instead called the Southern Song Dynasty a barbarian?

In fact, the Chinese nation does not necessarily include only the Han nationality, but also other nationalities. It's just that each nation has its own development track, and each nation influences each other and forms our nation together. However, Han people generally live in the Yellow River and Yangtze River basins, where there is a very prosperous culture, where people can farm and live and work in peace and contentment. Moreover, the Central Plains region has a long history of development and has excellent technological civilization and prosperous culture. Therefore, in many people's minds, Central Plains culture has always been excellent. Then, why does the Central Plains culture occupy such a high position in the hearts of Jin people? First of all, many ethnic groups covet the geographical location of the Central Plains. Although Jin people belong to nomadic people, they don't need to rely on farming civilization to eat. However, the weather has a great influence on them. Frequent bad weather will lead to the deterioration of the natural environment on the grassland and also affect the survival of nomadic people. But look at the Central Plains, even if the weather is bad, it will affect the crops all over the world, but not frequently. Therefore, from this perspective, the life of the people in the Central Plains is still relatively stable. There is also a nomadic people like Jin people, usually in tribes. The disadvantage of taking tribes as a unit is that it is impossible to establish a unified dynasty, so there will be disputes between tribes because of various things.

However, although the Central Plains region has a long cultural history, many nomadic people also envy the Central Plains region. However, it is impossible to conquer the nomadic people in the Central Plains, because if we want to fight, the supply of food is a big problem. After the founding of the People's Republic of China, he expanded his field to the Huaihe River Basin. He also bullied the Southern Song Dynasty and made them pay tribute to himself every year. After frequently occupying the Central Plains completely, the Great Wall was built to prevent the invasion of other nationalities, and it completely claimed to be the master of the Central Plains. At that time, the area where the elite was located was Jiangsu and Zhejiang, where Han people lived together. Now most people look down on the Han people, so in their eyes, the Southern Song people are barbarians.