In the early fifteenth century, China was a country with a high degree of civilization and developed economy and culture in the world. Wherever Zheng He went, he spread the Chinese calendar, books, crowns, measuring instruments and construction techniques, medical skills, etc. to the local people to promote China's system and culture. China's handicraft products, tea, porcelain, etc. have been imported into various parts of the West through exchange, and local materials and animals such as medicinal materials, spices, and gems in Asian and African countries have also been imported into China. So far in many places in Southeast Asia, there are stories about Zheng He's fleet, as well as ruins to commemorate Zheng He's temples.
The Zheng He fleet opened a route for China to cross the Indian Ocean, reach the Persian Gulf, the Arabian Sea, the Red Sea and southeastern Africa, opening the way for Westerners to sail. Later, when the Portuguese navigator Da Gama circumvented the Cape of Good Hope along the west coast of Africa and reached the coast of East Africa, the locals told them that the Chinese had come here several times a few decades ago. The fleet successfully arrived in India with the help of Arab pilots.