Energy-saving and practical greenhouses, such as intelligent multi-span greenhouses, intelligent glass greenhouses, flower greenhouse sheds, ecological restaurant greenhouses, winter-warm vegetable greenhouses, high-tech vegetable demonstration bases, photovoltaic power generation greenhouses, new high-temperature greenhouses, polycarbonate greenhouses, Dutch-style greenhouses, film greenhouses, solar greenhouses, breeding greenhouses, photovoltaic greenhouses, and research greenhouses.