The teaching land is for the exclusive use of the school, and no other non-teaching buildings may be built. Moreover, the granary construction standard is high and will not be built in schools. Moreover, the granary covers a large area, and the school will not have so much space to build.

China has a vast territory and a long history of grain production and storage. According to a large number of cultural relics and historical studies unearthed in China in recent 50 years, China's primitive agriculture originated in the late Paleolithic period and developed in the Neolithic period (about 1 10,000 years ago). Grain storage is the continuation of agricultural cultivation, and storage technology develops with the development of agriculture. After entering the new era, with the development of primitive agriculture, agricultural production has formed a certain scale, and there is a surplus of grain, which has gradually developed from grain processing to storage. Granary is an important part of grain storage technology.