石安大队位于凤城县南部,两面环山,沟河贯穿,是“八分半山,半水,一分田”的山区队。1961～1964年,由于单纯追求粮食产量,毁林开荒2,000多亩,造成水土流失,河床淤塞、河水泛滥,水冲砂压面积达1,100多亩。仅这四年,全大队就吃 Located in the southern part of Fengcheng County, the Shi’an Brigade is surrounded by mountains and runs through the ditch. It is a mountain team of “one-eighth of a half-mountain, half-half of water, and one sub-field.” From 1961 to 1964, due to the simple pursuit of grain output, more than 2,000 mu of land was destroyed by deforestation, resulting in water and soil loss, riverbed siltation and river flooding, and water and sand blasting area reaching 1,100 mu. Only four years, the entire brigade to eat