Duyun profile: Duyun, referred to as "even". The political, economic, and cultural center of southern Guizhou, an important transportation hub for the southwestern region, and one of the five major urban centers of the Central Economic Zone, the capital of the Buyi and Miao Autonomous Prefecture in southern Anhui. The total area of ​​Duyun City is 2,274 square kilometers, with a total population of 500,000 (2013). There are 33 ethnic minorities such as Buyi, Miao, Shui and Yao. The ethnic groups dominated by the Buyi ethnic group account for 67.08% of the total population. The city governs one provincial economic development zone, five offices, four towns, and one township (one of which is aquarium autonomous township). The total area of ​​urban built-up areas is 46 square kilometers (2013), and the urban population is 320,000 (including floating population). Duyun City is located on the Jianjiang River in Jiuxi Guiyi. Many rivers flow into the Jianjiang River at the source of the Minjiang River. The jasper-like Jianjiang River, flowing along the banks of the river, is a natural ecological environment with beautiful mountains and rivers. In 2012, he was awarded the title of “Global Green City”. Duyun has the reputation of “Plateau Bridge City”. In the urban area, there are nearly 100 bridges of different architectural styles, spanning the Jianjiang River that embraces the whole city. The quaint Baizi Ancient Bridge, the steepest Jianjiang River Bridge in the large and medium-sized bridges in the country, the Yinshi Bridge in the jade carving column, the Rainbow Bridge in the volley flying frame, the moon bridge in the elegant and elegant style... The bridge combines classical style with modern style, grand macro view and slenderness. It is known as the “Bridge Museum”.