One of the reasons is that the Han Dynasty is a rare country in history, and people live and work in peace and contentment. In the hearts of the people, the Han Dynasty is still very important. Everyone is proud of the Han Dynasty. Although the Han dynasty finally destroyed the country, it was impossible to hold people's hearts back. The Han dynasty was also famous all over the world. Everyone knows that the Han Dynasty was very powerful, so Liu Yuan wanted to borrow it.
The second reason is that in ancient times, the descendants of Hun Khan were of Han descent. Take Liu Yuan for example. His ancestors had a princess in the Han Dynasty. The Huns, following their mother's surname, are naturally descendants of the Han people. Although he is a Hun, his surname is Liu. Naturally, you can take the opportunity to say that you are from the Han Dynasty, and you can also use this as your country name.
The third reason is that the Han dynasty ruled for 400 years, and it didn't take long for the country to die. The situation in the world is still very chaotic, and the people are missing the Great Han Dynasty. Liu Yuan understood that if you want to hold this position by yourself at this time, you must prove to the people that your regime is legitimate and orthodox, and tell them that you are also a descendant of the Han people, so don't worry about being different. History has proved that he took advantage of the Han dynasty and successfully destroyed Jin, establishing Wuhu as the first of the sixteen countries of Han and Zhao.
The fourth reason is that Liu Yuan was dissatisfied with the Huns and often suffered unfair treatment from foreigners, so he also wanted to get close to the Han nationality. But he came with the Han nationality, and everyone knows that he is a Hun, and many talents of the Han nationality are not used by him. Then he will try to tell people all over the world that he is a Han Chinese, so as to properly stabilize the people's hearts.