Compare the planning of Chang 'an City in the Western Han Dynasty with that in the Tang Dynasty, and talk about the changes of Chang 'an City in the Tang Dynasty. What does this change mean?

1. The Tang Dynasty encouraged foreign trade, so the "city" for goods trading was located in the city center (roughly near the city center); However, in the Western Han Dynasty, agriculture was emphasized and commerce was suppressed. Both Xicheng and Dongcheng are located in the northwest corner of the city, and the scale is very small.

2. The palace of the Tang Dynasty was built in the north of the city, ranking first, symbolizing the authority of the royal family; Palace buildings in the Western Han Dynasty were all over the city.

3. The streets of Chang 'an in the prosperous Tang Dynasty are distinct, and the division of labor among city, square and pavilion is clear; The urban planning of the Western Han Dynasty was inferior to that of the Tang Dynasty in this respect.

For reference, please refer to the "Chang 'an Map of the Western Han Dynasty" published by People's Education Publishing House in the seventh grade of China history (P75).

Plan of Chang 'an City in Tang Dynasty Volume II P 15 Grade 7