Chang 'an, now called Xi 'an, is the Tang Dynasty.The capital of the city. During the Tang Dynasty, Chang 'an was about 11 times larger than today's Xi 'an and was a cosmopolitan city with an international reputation. Chang 'an's streets and residences are designed like a chessboard, with neat and symmetrical east and west layouts. In Chang 'an, many streets are more than 100 meters wide.

Chang 'an was also the cultural center of China at that time, with a rich variety of recreational activities, such as music, dancing, cockfighting and so on. Many Japanese and Korean students came to Chang 'an to study, and merchants from Central Asia gathered here along the Silk Road. Chang 'an has a population of about 1 million

The number of foreign households alone exceeds 10,000.