● Concept: It is a kind of indoor unheated greenhouse. Even in the coldest season, it only relies on sunlight to maintain a certain indoor temperature level to meet the needs of vegetable crop growth.

● Characteristics: Solar greenhouse must have a good lighting roof for maximum sunlight penetration; strong heat preservation and storage capacity to minimize heat dissipation; and appropriate dimensions for ridge height and back wall length. Generally covered with grass thickness for winter warmth.

● Structure: Strong resistance to wind pressure and snow load. The structure requires full and reasonable use of land to save non-production areas. Construction is based on local conditions and materials to reduce costs.