With the smoothness and prosperity of the "Ancient Silk Road", Chang 'an in Beijing has become a frequent place for traffic and guests, and the global prosperity of commercial services is usually the case. Businessmen and warriors traveling along the Silk Road will no longer be the only ones in the Han Dynasty. People looking for core beliefs and cultural exchanges are also slowly moving forward on this road. Buddhism was first introduced into China through the "Ancient Silk Road". By the Tang Dynasty, Chang 'an had become a battleground for Buddhism, with many pagodas, great monks and virtues, and hundreds of Buddhist temples. Chang 'an in the Tang Dynasty was like new york now. It not only makes Southeast Asian countries firmly follow the characteristics of China culture, but also makes businessmen in western countries deeply remember it.

The charm of Chang 'an in Tang Dynasty lies in the relatively developed big cities, prosperous economy and strong culture. Chang 'an, Beijing, formerly known as Xi 'an, is the first national capital called "Beijing" in history, and both of them are the first real big cities in history. Xibohou built his capital here and built Fengjing. After Zhou Wuwang succeeded to the throne, Hao Jing was built, which was collectively called Fenghao, and thus An was called "pickaxe". In the fifth year of Emperor Gaozu (AD 202), Chang 'an County was established. The Han Empire built Changle Palace on the premise of Longzhou Bay of the Yellow River, the northern end of Epang Palace and Qinxingle Palace. In the seventh year of Emperor Gaozu, Weiyang Palace was built. In the same year, the capital moved from Liyang to Chang 'an Township, hence the name Chang 'an. The basic function of local laws and regulations is to separate "residential areas" from "commercial areas". The residential area is called Fang, also called Li or Li, which is the most basic enterprise in ancient cities, and the commercial area is called Cheng, such as East City and West City in Tang Dynasty. The purpose of this is to facilitate management and maintain social order.

According to historical records, Chang 'an, the capital of the Tang Dynasty, was founded in the Yuan Dynasty, with an area of about 84. 1 square kilometer. There are three gates in the east, west and south, and the population in the city center is over one million at most. In the following thousands of years, Chang 'an in the Tang Dynasty was always "the first city in the world". In order to open a north-south street in front of the palace, Tang Gaozong Li Zhinian built Daming Pass, which divided Yishan Square in the northeast of Guo Cheng and Changsha Jinji Square into two, resulting in four squares: Guangzhai, Yishan, Changsha Jinji and Laiting. In that way, Dongcheng District has strengthened two squares compared with the 53 squares in the early Tang Dynasty to become 55 squares, and merged with the 55 squares in Xicheng District to form 1 10 square, and merged with the two cities.

During the reign of Emperor Xuanzong of the Tang Dynasty, in order to build Xingqing Palace, he came to Qin Long Square in the east of the street. In that way, Dongli Square in the street will be reduced by one square, from the original 55 squares to 54 squares, merged with 55 squares in Xicheng District, and Chang 'an 109 Square will be merged with the two cities. Xi 'an, formerly known as Chang 'an, is one of the four ancient capitals in China. Chang 'an was a large-scale national capital in the world at that time, with an urban area of more than 80 square kilometers, a population of more than one million, numerous shops and a prosperous market. In the Tang Dynasty, Chang 'an set up two areas in Guo Cheng where commercial services were concentrated, one was the East Market and the other was the West Market. They gradually developed into commercial squares in Chang 'an.