Yiyuan County, belonging to Zibo City, Shandong Province, is located in the center of Shandong Province, south of Zibo City. It is bordered by Linqu County in the east, Yishui County in the southeast, Laiwu District and Gangcheng District in the west, Xintai City in the southwest, Mengyin County in Linyi City in the south, and Boshan District and Zichuan District in the north, with a total area of 1,636 square kilometers.In 2021, Yiyuan County had a total household population of 572,400 people. As of October 2022, Yiyuan County has 2 streets and 10 towns under its jurisdiction, with the county government stationed at 61 Zhenxing Road. Yiyuan County was established in 1944 and was transferred to Zibo City in 1990. It is an old revolutionary area, enjoying the policy support of the old revolutionary area of Yimeng, the birthplace of ancient human beings in Shandong, the National Regional Tourism Demonstration Area, the Advantageous Area of Chinese Characteristic Agricultural Products, the National Civilized County, the National Key Ecological Functional Area, the National Pilot Area of Sustainable Development, the Pilot Area of Revolutionary Cultural Relics Protection and Utilization Piece Area County, and the National Quality and Safety Demonstration Area for Exported Food and Agricultural Products. In 2022, the gross regional product of Yiyuan County will be 32.88 billion yuan, an increase of 7.3% over the previous year. By industry, the added value of primary industry is 4.59 billion yuan, the added value of secondary industry is 13.85 billion yuan; the added value of tertiary industry is 14.44 billion yuan, and the proportion of three industries is 13.96:42.12:43.92.