Yinan County, subordinate to Linyi City of Shandong Province, is located in the middle Shandong area, adjacent to Juxian County in the east, Mengyin in the west, urban area in the south and Yishui in the north. Between north latitude 35°18 '26 "-- 35°46' 15", east longitude 118°6 '36 "-- 118°43' 31", the total area of 1719 square kilometers. It has jurisdiction over 14 towns, 1 sub-district and 1 provincial economic development Zone.

Yinan ancient Langya Yangdu, is the birthplace and ancestral home of Zhuge Liang and Yan Zhenqing. There are numerous cultural relics and monuments and cultural landscapes in the territory. There are nearly 100 historical sites in Han Dynasty, known as the "Qi-Lu Dunhuang" reputation; History is as follows: "Yangdu, the upstream of Linyi, a large number of outstanding men, the victory of smoke and water, the Yi in Jiangnan". During the Revolutionary War, the first provincial democratic regime led by the Communist Party of China was born in Yinan. Chen Yi, Xu Xiangqian, Luo Ronghuan, Su Yu and so on all fought and worked in Yinan.

By the end of 2021, Yinan County has a total population of 980,000. In 2021, the gross regional product of Yinan County reached 26.474 billion yuan, among which, the added value of the primary industry was 5.259 billion yuan, the secondary industry was 9.81 billion yuan and the tertiary industry was 11.406 billion yuan. The ratio of the added value of the tertiary industry was 19.86:37.06:43.08