Changyi City, Weifang City, Shandong Province, county-level city, is located in the northwestern Shandong Peninsula, downstream of the Weifang River, Laizhou Bay, between latitude 36 ° 25 ′ ~ 37 ° 08 ′, longitude 119 ° 13 ′ ~ 119 ° 37 ′, east and Yantai Laizhou City, Qingdao, Pindu City, the Jiao Laichang River as the boundary, south and Gaomi City adjacent to the west with the Fangzi District, the Hanting District, the North bordering Laizhou Bay, with a total area of 1,627.5 square kilometers. As of December 2022, Changyi City has 3 streets and 6 towns under its jurisdiction.In 2022, Changyi City had a resident population of 537,100, and a household population of 575,300. Changyi City was a county during the Spring and Autumn and Warring States Periods, and Changyi County was set up in Qin Dynasty, belonging to East County. In the Eastern Han Dynasty, it was part of the Jiaodong State, and on June 10, 1994, Changyi County was abolished and Changyi City was established as a county-level city with the administrative area of the former Changyi County. Changyi City is rich in resources, producing grain, oil, mulberry, vegetables and fruits, and has large reserves of petroleum, natural gas and underground brine, etc. It is known as the Hometown of Silk, Overseas Chinese, and Bromine and Salt in China. Changyi City belongs to the Bohai Economic Circle and is one of the coastal cities open to the outside world as determined by the State Council. It has been awarded the honorary titles of Greening Seedling Base of Northern China, Textile Industry Base City of China, Microfiber Industry Base of China, Top 100 Counties of Comprehensive Strength of Small and Medium-sized Cities in China, and Top 100 Counties of Small and Medium-sized Cities of the Most Promising Investment Potentials in China, and so on. In 2022, Changyi City will realize a regional GDP of 55.447 billion yuan, an increase of 4%. Based on the resident population, the per capita GDP reaches 101,103 yuan, an increase of 6.6%.