Outside the window, you must abide by the relevant provisions of the administrative department of city appearance and environmental sanitation of the people's government of the city. It is not allowed to change the original structural design without authorization, and to explore windows and balconies without authorization. According to Article 10 of the Regulations on the Administration of City Appearance and Environmental Sanitation (revised 20 17), all units and individuals should keep their buildings clean and beautiful. In the balconies and windows of buildings facing the street stipulated by the people's government of the city, no articles that hinder the appearance of the city shall be piled up or hung. Building or closing a balcony must comply with the relevant provisions of the administrative department of city appearance and environmental sanitation of the people's government of the city.