The historical information obtained is: 1, the number and time of Zheng He's voyages to the Western Ocean and the number of voyages to the Western Ocean; 2. Large scale; 3. Types of foreign trade articles of Zheng He's voyages to the West: 4. Historical significance of Zheng He's voyages to the West:

5. You can indirectly understand the strength of the Ming Dynasty and the purpose of going to the West.

Singapore's economy is developed, and its economic and living standards have reached the level of developed countries. The economy is dominated by services, shipping, logistics, finance, scientific research and tourism. In recent years, it has actively developed high technology and education.

Malaysia and Thailand have a certain foundation for economic development, with tourism, manufacturing, agriculture and fisheries as the main sectors. In recent years, they have actively developed shipping and logistics.

The economies of Vietnam, the Philippines and Indonesia are relatively backward, with only tourism, manufacturing, agriculture and fisheries.

Myanmar, Cambodia, Laos and East Timor are economically backward, and the economies of Myanmar, Cambodia and Laos are only tourism and agriculture. East Timor's economy has only fisheries and oil exports.

Although Brunei's per capita GDP is similar to that of developed countries, its economy is underdeveloped. Its economy is dominated by oil and natural gas exports, and its wealth, like that of oil-producing countries in the Middle East, is only concentrated in a few wealthy classes.