The blue and green of rural house numbers represent different meanings respectively. Blue house number generally refers to the residential house number of rural families, which is used to identify the address of farmers' families. These doorplates are generally installed by local governments, with blue backgrounds and black or white fonts printed on them, which is convenient for service personnel such as express delivery and distribution to find customers. Green doorplate is a sign of rural agricultural production and forestry resources development, which is mainly used to indicate the utilization of resources in cultivated land, woodland, fishing village and other areas. These doorplates are usually installed by rural collective economic organizations or farmers themselves, with a green background and characters and patterns printed on them, which are used to identify information such as land owners, planted crops and forest species. To help rural management departments manage and supervise resources. In short, the blue house number is to identify the address of rural households, and the green house number is to identify the utilization of rural resources. The purpose and scope of use of the two are different.