Difference:
1, construction history is different.
Chang 'an City was built in the Sui Dynasty in the Tang Dynasty and renamed Chang 'an City in the Tang Dynasty.
Beijing City in Ming and Qing Dynasties and Judy in Ming Dynasty chose Beijing as the capital to start construction.
2. Different ingredients
Chang 'an consists of Miyagi, Imperial City and Outer Guo Cheng.
Beijing constitutes the basic outline of Miyagi, Imperial City, Inner City and Outer City.
3. The background is different
Chang 'an City, Tang Dynasty, February, 58 1 year, Emperor Wendi of Sui Dynasty was proclaimed emperor by the Zen Dynasty, with the title of Da Sui. As Emperor Wendi of the Sui Dynasty was a new dynasty established to replace the old ministers of the Northern Zhou Dynasty, Chang 'an was still the capital of the early Sui Dynasty. However, this is only a stopgap measure. This old capital, which has a history of 780 years since the Han Dynasty, is no longer suitable for the needs of the new unified dynasty.
When the Yuan Dynasty was founded, most of them were chosen here. The Yuan Dynasty was planned by planners, astronomers and water conservancy experts Liu and Guo Shoujing. ? Feng Shui pays attention to the mountains and water where the city is located. The only drawback of the established mountains in Beijing is that there is not enough water. Then the two men led two water veins on the ground and underground to the capital.
The water on the ground comes from Yuquan Spring, which is known as "the first spring in the world". The artificial spring diversion canal flows through Taiping Bridge-Ganshui Bridge-Qiao Zhou, and goes straight to Tonghui River. Because the water comes from the "golden" position of western gossip, it is named "Jinshui River". The underground water vein in Yuan Dynasty also came from Yuquan Mountain. This well is very sweet, and the water level does not change in dry season. Later, it became a sacred place dedicated to the "Longquan Well God" in the palace.
Baidu Encyclopedia-Tang Chang 'an City
Baidu Encyclopedia-Beijing City in Ming and Qing Dynasties