Neighborhood Unit is an urban planning and design concept that advocates the establishment of relatively independent residential neighborhoods in a city, each with basic amenities and services to meet the needs of residents in their daily lives. The core concept of the neighborhood system is to divide the city into multiple small-scale, humanized neighborhoods in order to achieve the integration of multiple functions such as living, working, and leisure.

The main features of the block system include:

1. Humanized scale: blocks in the block system are usually small in scale, which is conducive to the formation of close neighborhoods and community atmosphere.

2. Mixed functions: Neighborhoods contain a variety of functions such as residential, commercial, educational, medical, and recreational functions to meet the needs of residents in their daily lives.

3. Pedestrian-friendly: Neighborhoods encourage people to travel on foot, reducing reliance on motor vehicles and improving the livability and sustainability of the city.

4. Green: Neighborhood system emphasizes the importance of green space and advocates the installation of parks, squares and other public **** green spaces in the neighborhoods to improve the quality of the city's ecological environment.

5. Community Participation: The block system encourages residents to participate in the planning, construction and management of the block in order to improve community cohesion and residents' sense of belonging.

The application of the block system in urban planning and construction can help improve the quality of urban life, ease traffic congestion, reduce energy consumption, and protect the ecological environment. At the same time, the neighborhood system can also promote the development of urban economy and culture, and enhance the attractiveness and competitiveness of the city.