Chang 'an Street, which spans Jinshui Bridge in Tiananmen Square, is named East Chang 'an Street from the left gate of Chang 'an to Dongdan archway (demolished). From the right gate of Chang 'an to Xidan archway (demolished), it is called West Chang 'an Street: The ancient East-West Chang 'an Street is only 3.7 kilometers long and is called Ten Li Long Street. It is a famous "Tianjie" in Beijing history and one of the most famous classical and modern streets in the world. Its name is taken from the title of "Chang 'an", a capital city in the prosperous Tang Dynasty, which means long-term stability.

Chang 'an Street was built in the 4th year of Yongle in Ming Dynasty to 18 (1406- 1420). It was built at the same time as the Imperial City, and it was one of the important parts of the overall planning of Beijing's urban construction in Ming Dynasty. Chang 'an Avenue, which is parallel to the east and west, and the central axis of Imperial Road, which is eight kilometers long from north to south, intersect vertically in front of Tiananmen Square, forming the precise center point of the cross-shaped longitude and latitude coordinates, thus forming the overall layout of Beijing, with streets facing south and criss-crossing.

On the east and west sides of Chang 'an, giant dismount tablets are erected in front of the left and right doors, which are engraved with "officials, etc." Dismount here. " Riding was forbidden in the ancient imperial palace, unless you were the champion of the new branch when the Golden Palace was handed down from generation to generation, you could ride the big horse given by the emperor and walk on Chang 'an Avenue to show your gratitude. Yang Yiqing, an important official of the Ming Dynasty, once wrote a poem: "On the third day, during the lent of Xinglong Temple, banners were hung around Wangtian Street. I used to be afraid to ride a horse for a long time, and there were cards on it. " It is conceivable that the traffic regulations at that time.

After the demise of the Qing Dynasty, Jianguomen and Fuxingmen on the east and west sides of the inner wall were opened in the 29th year of the Republic of China (1940).

Especially since the founding of New China, Chang 'an Avenue in the past has changed the old ideas and undergone tremendous changes. In order to facilitate the development of modern traffic, the original stone road on Chang 'an Avenue was changed to asphalt road, and the pavement was widened to 50- 100 meters. The extension line of Chang 'an Street reaches Tongzhou and Shijingshan from east to west, with a total length of 40 kilometers and a reputation of a hundred miles long street. In Bailichang Street, elevated roads and subways are running. The streets are lined with trees, flowers in full bloom and brightly lit, surrounded by endless rows of high-rise buildings, showing a scene of prosperity.