Ключевые слова: abstract, architecture, background, black, blue, building, business, china, city, climb, concrete, construction, curve, design, escalator, floor, glass, guangzhou, indoors, inner, inside, interior, light, marble, metal, modern, new, office, pattern, perspective, round, shape, spiral, stair, staircase, stairway, step, structure, travel, urban, wall, way, white, window, work,