Ключевые слова: area, autumn, blue, canyon, china, district, ecotourism, environment, farmland, geography, geomorphology, grand, haihe, hebei, hole, important, land, landscape, leaf, light, mountain, national, natural, outdoor, peak, plant, poverty, province, red, reed, reeds, river, road, rural, sanggan, scenery, sky, surface, tree, trees, tributary, upstream, valley, vegetation, water, yellow, yongding, zhangjiakou,