Why is it said that the Tang and Song Dynasties were the heyday of my country’s tourism culture?

Because the Tang and Song Dynasties were a prosperous period for my country's feudal society, there were many exchanges between China and foreign countries, convenient transportation, developed economy, and prosperous culture, which promoted the development of tourism. The prosperity of commerce has led to an increase in the number of Chinese and foreign businessmen traveling to and from China. The prosperity of culture has led to cultural exchanges between China and foreign countries. More foreign students have come to study in China. The development of foreign relations has also led to more exchanges between the Chinese government and foreign governments and more envoys coming and going.

So many people coming and going has promoted the development of tourism