Ключевые слова: ancient, architecture, asia, asian, autumn, barrier, beautiful, beijing, blue, border, brick, building, china, chinese, construction, culture, east, eastern, fall, famous, great, greatwall, heritage, hill, historic, history, landmark, landscape, mountain, mutianyu, natural, nature, old, oriental, outdoor, protection, scenery, scenic, season, sky, stone, structure, tourism, tower, travel, wall, wonder, world,