1. What was Zheng He's voyage to the West like? In order to strengthen ties with western countries and publicize the national prestige of the Ming Dynasty, 1405- 1433, Ming Chengzu sent Zheng He to the West. Zheng He led a huge fleet of more than 27,000 people and more than 200 seagoing ships. He set out from Liujiagang, the mouth of the Yangtze River, and made seven voyages to the Western Ocean, reaching as far as the east coast of Africa and the Red Sea coast of more than 30 countries and regions in Asia and Africa, which was worse than the voyage of European navigators for more than half a century. Arriving in various countries was warmly welcomed. Silk porcelain on the ship is very popular and is used to exchange jewelry, spices and medicinal materials from various countries. On the way back, many envoys of the king came to visit by boat.

2. The objective role of Zheng He's voyage to the West? Zheng He's voyage to the West is a feat in the history of world navigation and a great navigator in China and the history of the world. Zheng He's voyages to the West promoted the economic exchanges between China and Asian and African countries, and strengthened the friendly relations between China and Asian and African countries.

3. What was Zheng He's voyage to the West like? In order to strengthen ties with western countries and publicize the national prestige of the Ming Dynasty, 1405- 1433, Ming Chengzu sent Zheng He to the West. Zheng He led a huge fleet of more than 27,000 people and more than 200 seagoing ships. He set out from Liujiagang, the mouth of the Yangtze River, and made seven voyages to the Western Ocean, reaching as far as the east coast of Africa and the Red Sea coast of more than 30 countries and regions in Asia and Africa, which was worse than the voyage of European navigators for more than half a century. Arriving in various countries was warmly welcomed. Silk porcelain on the ship is very popular and is used to exchange jewelry, spices and medicinal materials from various countries. On the way back, many envoys of the king came to visit by boat.

4. Why is it said that the unification of the Yuan Dynasty promoted national integration?

During the Yuan Dynasty, many Han people came to the frontier and made contributions to the development of the frontier. Ethnic groups in the border areas, including Mongolians, sneaked into the Central Plains and Jiangnan in large numbers and lived together with the Han people. Living together for a long time, the Khitan Nuzhen who first entered the Yellow River valley is no different from the Han nationality. Relying on the Yin-Yang Islam in the Tang Dynasty, many Persian Arabs who settled in China lived together with the Han, Mongolian, Uygur and other ethnic groups for a long time, exchanged marriages and gradually merged, and began to form a new ethnic group-Hui. The large-scale population movement in Yuan Dynasty promoted the economic and cultural development and integration of all ethnic groups.