Two, the overall size of the greenhouse and the scale of the greenhouse: the overall size of the greenhouse mainly includes the length, width, total height of the greenhouse. 1. Length: refers to the overall length of the greenhouse in the overall size of the larger direction. 2. Width: refers to the total length of the greenhouse in the overall smaller direction. 3. Total height: refers to the distance between the floor height in the greenhouse and the highest point of the roof frame of the greenhouse. The highest point can be the highest point of the greenhouse roof or the highest point of other components outside the greenhouse roof (such as external systems, etc.). The overall size of the greenhouse determines the plane and space scale of the greenhouse. Generally speaking, the larger the scale of the greenhouse, the better the internal climate stability, the lower the unit cost, but the total investment increases, and the management difficulty increases. Therefore, it is difficult