1, the prosperity of Hanwu was the heyday of the Western Han Dynasty. Relying on the accumulation of Wendi and Jingdi dynasties, the economy reached its peak and the national strength was strong. Those who committed crimes against China and strengthened the Han Dynasty abroad, though far away, will also be punished. Wei Qing, Huo Qubing, Li Guang and other famous soldiers attacked the Xiongnu many times, driving the once tyrannical Xiongnu thousands of miles north, and letting the forces of the Central Plains regime reach Mongolia for the first time. Strike Dawan in the west, strengthen the rule of the Han Dynasty in the western regions (now Xinjiang) by force, destroy Korea in the east and South Vietnam in the south, reaching the limit of the Han Dynasty border.

2. The flourishing age of Kaiyuan was the peak of the economy in Tang Dynasty, and the people lived and worked in peace and contentment. Although the border was not as big as Gaozong, China occupied the whole northeast for the first time. Kaiyuan Shi Sheng's martial arts is not the strongest, and its management of the world is mainly literary records. In its heyday, the Central Plains Dynasty created a situation in which the four barbarians paid tribute, and a tribute system was really established, with more than 40 tribute countries.

3. During the prosperous period of Yongle, China took the army as the best in Asia. With the support of a strong economic foundation, Yongle made five northern expeditions to Mongolia, and Temujin's descendants fled, all of which did not destroy the world that year. Tatars, Walla people and Uhaliang people all paid tribute. The South defeated Hu Annan (present-day Vietnam), and after losing Annan in the Five Dynasties, it planted the flag of the Central Plains on Annan. Zheng He's voyage to the West created the history of China's navigation. The huge fleet of more than 20,000 people made seven voyages to the Western Ocean, spreading China's fame all over the ocean. In the Ming Dynasty, dozens of countries also paid tribute. These countries really served China, and were not conquered by western colonialists.