1. Zheng Chenggong recovered Taiwan Province Province.

2. Left to recover Xinjiang

3. Qin Shihuang repaired the Lingqu.

Qin Shihuang unified Nanshao.

5, the early Han Dynasty sealed the king

9. Han and Xiongnu are close relatives.

7. Genghis Khan expedition

8. Princess Wencheng married Tubo

National unity is a spirit, an ideological integration force and a pursuit, which plays an important role in rallying people's hearts and integrating society. China is a unified multi-ethnic country. National unity is related to the life and death of the Chinese nation, the safety of the country and the fundamental interests of the people of all ethnic groups. Without national unity, there will be no social stability; Without national unity, there will be no economic development; Without national unity, it is impossible to build a harmonious socialist society. Strengthening national unity is a national policy that conforms to the historical development trend and a major measure that conforms to the feelings and aspirations of the broad masses of the people throughout the country. Facing the overall stable and local turbulent world political situation and the urgent need of building a well-off society in an all-round way in China, we should stick to Scientific Outlook on Development and further enhance our understanding of the importance of national unity. The 60th anniversary of the founding of New China is a 60-year period of common struggle, prosperity and development of all ethnic groups in China under the leadership of the Party. The features of ethnic minorities, ethnic relations and the cause of national unity and progress have undergone historic and tremendous changes. Over the past 60 years, national unity has laid a solid foundation for the prosperity and development of the motherland. Today, we can more deeply understand the great significance of national unity and the importance and necessity of national unity from the combination of history and reality.