Ключевые слова: abstract, architecture, art, backdrop, background, blue, building, business, cement, city, cityscape, concrete, construction, corridor, design, empty, entrance, exterior, floor, footpath, futuristic, glass, ground, hall, high, horizontal, landmark, lobby, modern, nanjing, nobody, office, outdoor, panorama, place, reflection, road, shopping, skyline, skyscraper, steel, structure, technology, urban, walkway, wall, window,