Changchun City, referred to as "long", also known as "Spring City in the North", the ancient name of Xidu, tea ah Chong, prefecture-level city under the jurisdiction of Jilin Province, the provincial capital, sub-provincial cities, type I large cities, the core city of the Harbin-Changsha urban agglomeration, the State Council approved one of the centers of northeastern China and an important industrial base. Important industrial base. Changchun has 7 districts, 1 county and 3 county-level cities under its jurisdiction, with a total area of 24,592 square kilometers.In 2023, Changchun's GDP was 700.21 billion yuan, up 6.6% year-on-year, with a resident population of 9.1019 million at the end of the year. Changchun is located in Northeast China, in the geographic center of Northeast China, bordering Songyuan, Siping, Jilin and Harbin, respectively. It is the center city of Northeast Asia Economic Circle, the famous old industrial base of China and the earliest automobile industry base and film production base of New China, and the cradle of the development of new China's railroad buses, optoelectronic technology, applied chemistry, bioproducts, etc., and gave birth to the first Chinese Ltd., Changchun Railway Coach Co., Ltd., Changchun Film Studio, Changchun Institute of Optical Precision Machinery and Physics of the Chinese Academy of Sciences, Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences, Changchun Institute of Biological Products. Changchun is a national historical and cultural city, with many historical monuments, industrial heritage and cultural relics, and is the centralized witness of the complete course of political and military conflicts in modern Northeast Asia. It is also one of the four major garden cities in China, with a greening rate that ranks among the top of large cities in Asia, and is also a pilot city for "Made in China 2025", It is also a pilot city of "Made in China 2025" and one of the first national pilot cities for urban design.