Ключевые слова: ancient, brick, cave, china, chuan, culture, desert, fortress, frontier, gate, gray, great, gully, history, imperial, ladder, landscape, ming, mountain, ningxia, old, pavilion, protection, qin, rampart, red, ridge, river, ruin, ruins, sky, stone, studio, tomb, tourist, travel, view, wenchang, western, wonder, world, xixia, yinchuan, zhenbei,