Ключевые слова: a light, abandoned, abuse, activities, ancient times, and autumn, architecture, army, assembled, brick, castle, channel, china, culture, damage, defense, disrepair, engineering, environment, exports, heritage, history, indoor, internal structure, intrusion, landscape, light, military, nature, outdoors, passengers, precious, preserve, scenery, scenic spots, season, sites, solid, the enemy, the gray, the great wall, the mouth of the cave, the north, tourist, walks, wall, workers, years,