On basic farmland, planting greenhouse vegetables or actively using solar greenhouses to adjust agricultural structure and develop modern agriculture are all strongly advocated by the state. Shandong, Henan, Jiangsu, Sichuan, Hunan and other provinces vigorously promote vegetable production, paying special attention to out-of-season vegetables. These vegetable bases use basic farmland because of production needs. In addition, large and small towns, for the people's "vegetable basket project", will develop vegetable cultivation in the suburbs, mainly in greenhouses. These modes of production are not only illegal, but also an important measure to develop modern agriculture and an important pillar of agricultural industrialization. Shouguang and Yangling are among them.