Ключевые слова: autumn color, autumn landscape, autumn on the dam, birch, birch forest, blue sky, blue sky and white clouds, chengde, cloud, electricity, energy, environmental protection, fall, fan, generator, grassland, green energy, hebei, hills, house, house on the prairie, line, mulan paddock, new energy, on the dam, paddock, power generation, power grid, prairie tianlu, prairie wind power, public utilities, scenery on the dam, state grid, street light, turbine, white birch, wind, wind energy, wind farm, wind power, wind power grid, wind turbine, windmill,