During the Tang Dynasty, many foreigners, including Persians, Arabs and Japanese, gathered in some big cities in China, such as Guangzhou, Chang 'an and Luoyang. At that time, the traffic was not as developed as it is now. It was very difficult to go abroad, and it was very dangerous along the way. You might meet some mountain thieves and wild animals, but these foreigners all like to come to the Tang Dynasty. I think there must be a reason for this.

The first point is that the national strength of the Tang Dynasty was very strong, such as the famous "Kaiyuan Shi Sheng" in history. At that time, the national strength of the Tang Dynasty reached its peak, and Xuanzong of the Tang Dynasty vigorously developed the country's economy and culture. So at that time, many foreign businessmen came to the Tang Dynasty to do business, such as some precious things such as jewelry, spices and ivory, and brought them to the Tang Dynasty for trade activities. The fundamental reason is that people were well-off at that time, so they did it.

The second point is the policy relationship at that time. At that time, the Tang Dynasty was the absolute overlord in any aspect, and Xuanzong of Tang Dynasty attached great importance to the development of foreign trade at that time, and people at that time were not very disgusted with the arrival of some foreign businessmen, so it showed a thriving development trend at that time. Because of the policy support, some foreigners would attract more people after making money in the Tang Dynasty, so the Tang Dynasty at that time was very attractive to foreigners.