What is the architectural layout of Dali ancient city?

The ancient city of Dali is about 1000 meters wide from east to west and 2000 meters long from north to south. There are three streets in the north-south direction and five or six alleys in the east-west direction. Houses in the city are residential houses with tile roofs and civil structures, and streets are mostly paved with bluestone slabs. Most streets have clear spring water flowing from Cangshan Mountain. There are four gates and four turrets in the ancient city of Fiona Fang. There are four gates around the city wall, namely Erhaimen (also known as Tonghaimen) in the east, Shuanghemen (also known as Chengen Gate) in the south, Cangshan Gate in the west and Santanmen (also known as Anyuan Gate) in the north. There is a moat outside the city, which was rebuilt many times in Qing Dynasty. The city maintains a typical chessboard structure, and the streets in the city are criss-crossed, which is called "Nine Streets and Eighteen Alleys". The layout of this city is checkerboard. The north and south gates are symmetrically staggered. Three streets in the north and south and six streets in the east and west constitute the main road pattern of Dali city.

The center of the city is west, and the central axis of the north and south is not centered, forming an urban layout in which the west is more important than the east, while the east and west doors are staggered by the principle of not taking things from the north and south in white buildings. The architectural style in the city is suitable, the city looks simple and the streets are surrounded by flowers. On the street, some old houses are surrounded by flowers and trees, and there are several pots of plants in a well. Up to now, there are still a large number of buildings in the city during the Ming and Qing Dynasties and the Republic of China, among which temples, academies, churches and other ancient buildings are dotted. For example, the ruins of Jianggong Temple, Du Wenxiu Shuaifu, and the Catholic Church are all traditional layouts of Dali Bai people's residential courtyards, with blue tiles and white walls and landscape murals, which are of a quaint style. Sanfang refers to the main building facing west and east and the ancillary buildings on both sides. Opposite the main building is the zhaobi, that is, the houses and zhaobi of the three-party building form a small square courtyard, also called patio, in which flowers and trees are planted. The residential buildings with three squares and one wall show the long and ancient culture of the Bai people in Dali in the form of courtyards. The building faces Erhai Lake, the back faces Cangshan Mountain, and the gate faces Dongsheng. The sun shines on the courtyard for the first time, and the quiet courtyard is full of light and warmth. Dali ancient city is located in the west of Yunnan Province, also known as Ye Yucheng and Zi Cheng. The history of the ancient city can be traced back to the Tianbao period of the Tang Dynasty, and the Yangcheng built by Luo Feng of Nanzhao Wang Ge is its new capital. The ancient city was built in the 15th year of Ming Hongwu (1382), covering an area of 3 square kilometers.