shuangqiaoquIntroduction：Introduction to Beibei: Beibei, because of the huge stone reaching into the Jialing River, and because it is in the north of Zhangzhou, it is named Beibei. Beibei District is located in the northwestern part of Chongqing City. One of the nine districts of Chongqing's main city is the first economic development zone in China's history with prior planning and construction as planned. Beibei District is surrounded by Jinyun Mountain and Jialing River. It is famous for its rich cultural atmosphere, famous scenic spots, strong scientific and technological strength and beautiful garden city. The environment in this area is very beautiful. The quality of air environment has been ranked first in Chongqing's main city for 12 consecutive years. The number of excellent air quality days above Grade II has been maintained at 338 days for a long time, 2,906 hectares of garden green space, 1,245 hectares of public green space, and 1245 hectares of green area in the built-up area. Coverage rate reached 44%. The per capita park green space reached 26.16 square meters, and the forest coverage rate of the whole district reached 48.68% (as of 2013). Beibei District is the first scenic spot in the country. It is known as the “Pearl of Jialing River”, “Chongqing City Garden” and “Chongqing Main City Back Garden”. Beibei District is connected to Yubei District in the east, Shapingba District in the south, Laoshan District in the west and Chuanchuan District in the north. As of 2013, the area has a total area of ​​755 square kilometers, and the urban area has built 45 square kilometers. It consists of 5 streets and 12 towns, with a resident population of 730,000 and a density of 967 people per square kilometer. Among them, 346,400 non-agricultural workers. It is dominated by the Han nationality, and there are more than 7,000 ethnic minorities such as Hui, Manchu, Tujia, Miao, Bai and Mongolian. Beibei District is a city-level scenic tourist area, an intellectual clean industrial base, the first national garden city in the west, a national green model city, a national environmental protection model area, a national ecological demonstration area, the China Habitat Environment Model Award, and the first batch of national countries. National honors such as the Advanced Demonstration Zone for Sustainable Development, and awarded by the UN-Habitat for Environmental Protection, the Dubai International Habitat Environment Good Example Award.