The ancient Li Fang system refers to the form of urban planning.

The ancient Li Fang system refers to the division of urban planning in the form of four squares.

In China, urban residential areas have experienced five forms: Luli system, Li Fang system, street system, neighborhood unit system and community system. Li Fang system is the basic unit of ancient urban and rural planning in China and the synthesis of housing management system.

The arrival of the Iron Age, the establishment of the feudal system, and the rise of local forces contributed to the first urban development climax in China's history, with emerging cities springing up like mushrooms after rain.

Divide the whole city into several closed buildings as residential areas, while the commerce and handicraft industry are limited to some cities with time switches. The rulers' palaces and offices occupy the most advantageous positions in the city and are protected by city walls. Li Hecheng is surrounded by high walls, and there are gates inside. The gates are managed by officials and city officials, and the whole city is under curfew.

Li Fang system

Or Li Hefang. It is the basic residential unit of ancient cities in China. Li Fang system became more and more perfect from the Northern Wei Dynasty and reached its peak in Chang 'an City in Sui and Tang Dynasties. In the urban structure, Li Fang is uniform, and thousands of houses are like a chess game. In citizens' life, a strict night ban system was implemented. In the Tang Dynasty, the gate of Chang 'an City was closed at night, and no one walked outside the square, showing a silent night.

Li Fang is the basic unit of urban spatial planning in ancient China. This is a way of life. It is combined in a huge body like a cell, running the vitality of the city. Li Fang, as a system, was once a stable model in the urban planning of ancient China for hundreds of years. It is unique, almost unique among ancient cities in the world.

Therefore, the study of the medieval city of Li Fang has attracted much attention, and many scholars have expressed their incisive opinions, as well as different opinions and issues not involved. The human life and social culture produced under the Li Fang model reflected the group appearance of the society at that time, and even influenced the cultural tradition of China for a long time.

The above contents refer to Baidu Encyclopedia-Li Fang System.