孙留、上涧是宜阳县莲庄乡所属的两个村，坐落在洛河南岸，紧邻公路、交通便利，浇排水条件良好。１９９６年建造土木结构日光温室１８０座，主要进行番茄、黄瓜等越冬茬蔬菜生产，是近几年全村第一支柱产业，农民群众的主要经济来源。但随着种植年限增加，经济效益下降，为了 Sun Liu and Shangjian are two villages belonging to Lianzhuang Township in Yiyang County. They are located on the south bank of Luohe River and close to the highway with convenient transportation and drainage. In 1996, it built 180 solar greenhouse with civil structure, mainly producing winter vegetables such as tomato and cucumber. It is the main economic source of the first pillar industry and peasant masses in the village in recent years. However, with the increase of planting years, economic benefits have declined in order to