Liangdang County, belonging to Longnan City, Gansu Province, is located in the southeastern part of Gansu Province and the northeastern part of Longnan City. As of the end of 2019, Liangdang governed 6 towns, 6 townships, 2 workstations and 118 administrative villages, with a total area of 1408 square kilometers. According to the seventh census data, as of 00:00 on November 1, 2020, the resident population of Liandang County was 39,709 people. Liangdang ancient name of the old road, solid road, Qin Huiwen Wang years set the old road county, the Northern Wei dynasty began to set the solid road county Liangdang County, due to the territory of the two when the river and named, after 1985, assigned to the Longnan region, Longnan city jurisdiction. Located in shaanxi, gansu, sichuan junction of the qinling mountainous area, known as "qinlong of the defense of the shield, bashu of the silencing throat" of the name, the territory of the elevation of 773-2738 meters between, belongs to the warm-temperate zone continental monsoon climate, rich in heat and light, abundant rainfall, the difference is remarkable. There are rare animals such as Qinling antelope, clouded leopard and forest musk in the territory, and there is Gansu Xiaolongshan National Nature Reserve. Natural resources include hydro energy resources, biological resources, mineral resources, etc. In 2015, Liangdang County completed a GDP of 601 million. It is "China's deep breathing small city", "national civilized county", "national greening model county", "national ecological garden county", "China's deep breathing small city", "national civilized county", "national civilized county", "national ecological garden county ", "China's famous green county", famous specialties such as wolf's tooth honey, seven miles of incense, ginkgo, black fungus, etc., within the territory of the Liangdang mutiny memorial hall, Yunping Three Gorges Natural Scenic Area, Lingguan Gorge, Zhang Guolao Dengzhen Cave, Heihe Nature Reserve, and other tourist attractions.September 25, 2018, obtained the Ministry of Commerce "2018 Comprehensive Demonstration County of E-commerce into Rural Areas" honorary title.In October 2018, Gansu Provincial Government issued a notice officially approving the withdrawal of Liangdang County from the sequence of poverty-stricken counties.In December 2018, it was awarded the title of the second batch of national ecological civilization construction demonstration cities and counties. In 2020, Liangdang County's gross regional product will be 1.11 billion yuan, an increase of 1.6%, total retail sales of consumer goods will reach 134.8 million yuan, and fixed asset investment will be 343 million yuan.