2. Gao Xianzhi was defeated and tried to spread papermaking to the west. Papermaking spread all over the world, which promoted the development of history.

Japan, Korea and West Asia all have far-reaching influence. make paper

The imperial examination system in Sui and Tang Dynasties was studied in the West.

5 to study and trade. At that time, there were more than 70 countries, and foreign nobles sent their children to Chang 'an imperial academy to study China culture.

The convenient transportation and management system in the Tang Dynasty facilitated international exchanges. The land extends in all directions. There are many sea routes, and there are three ways to Japan. And opened up the maritime traffic from Guangzhou Vietnam Sea to Southeast Asia, West Asia, Egypt and East Africa. Therefore, Tang enjoyed a high international reputation at that time and was the center of economic and cultural exchanges among countries in the world.