Nestorianism (Eastern Orthodox religion) was introduced to China from the Eastern Roman Empire in the early Tang Dynasty. The Chinese Tablet of Nestorianism in Daqin Dynasty preserved in the Forest of Steles in Xi 'an is the physical witness of this historical fact. In the middle of the Tang Dynasty, Manichaeism (also known as Zoroastism or Zoroastism) was introduced from Persia. After being Sinicized, it was called "enlightened religion", which was deeply believed by many working people. Leaders of many peasant uprisings after Tang and Song Dynasties used its teachings to organize poor peasants to fight against feudal rulers. In the prosperous Tang Dynasty, the Chinese paper-making technique was also introduced into the Great Food Empire, and soon it was introduced into European countries.
In the Tang Dynasty, the East and the West introduced and transplanted a lot of things, medicine, dance, martial arts and some famous animals and plants, so that both sides increased a lot of vision. In the Han Dynasty, Western imports were labeled with Hu characters, such as Hu qin, Hu melon, carrot, etc. In the Tang Dynasty, it was customary to title their names with sea characters, such as begonia, sea stone pomegranate, sea pearl (Persian Gulf pearl), etc. According to the Code of the Tang Dynasty, the Tang Dynasty had exchanges with ambassadors from more than 300 countries and regions. Every year, tens of thousands of foreign guests came to Chang 'an, the world's largest metropolis, via the Silk Road, and thousands settled in Guangzhou alone.
