Ключевые слова: background, blur, brt, building, business zone, change background, china, city, commercial, curtain, daytime, design, evening, focus, focusing, glass, guangzhou, head, high definition, large size, low angle, make, modern, passerby, pavement, reflections, retouching, road, shopping, sky, skyscraper, squares, streets, sunlight, sunny day, tall buildings, trading area, urban, virtual,