李鹏总理的批示春云同志：调查报告已看过，陕北水土保持经验值得重视。抗日战争年代，延安的山是光秃秃一片，一发大水，延河泥浆就滚滚而来。今日延安已变了模样，满山遍野种植了苹果树，宝塔山周围松柏长青，乔儿沟进行了小流域治理，谷子亩产有的达到１０００斤。榆林... Comrade Li Peng commended Chunyun: As the survey report has read, the experience of soil and water conservation in northern Shaanxi deserves attention. Anti-Japanese War era, Yan’an is a mountain of bare, a flood, Yan River mud rolling on. Today, Yan’an has changed its appearance. The apple trees are planted in the mountains and plains. Evergreen cypress trees around Pagoda Mountain and Qiaolou Gulch have been managed by small watersheds. Some millet acres have reached 1,000 kilos. Yulin ...