Liaoyang is a five-tier city. Mainly due to the relatively backward economic development, imperfect urban infrastructure construction, relatively single industrial structure, lack of attractiveness and competitiveness. Affected by the surrounding first-tier cities, the development speed is relatively slow. Liaoyang, formerly known as Xiangping and Liaodong, is a prefecture-level city under the jurisdiction of Liaoning Province. It is a modern industrial city focusing on petrochemical industry, a central city in south-central Liaoning, and a national historical and cultural city approved by the State Council. Liaoyang, located in the northeast of China and the middle of Liaoning, is a sub-central city of Shenyang metropolitan area, an emerging modern petrochemical textile industrial base and an excellent tourist city in China. It is one of the earliest cities in Northeast China. From the 3rd century BC to the early 7th century, it has been the political, economic, cultural center, transportation hub and military center of northeast China. Liaoyang is one of the oldest cities in the northeast of China and a famous cultural city with a history of more than 2,000 years. During the Warring States Period, it was ruled by Liaodong County of Yan State and controlled by Qin Yan. Liaoyang was the capital of Liaodong in the early Han Dynasty, and Liaodong County was still located here. During the Gongsun period, Xiangping was ruled by Pingzhou and Liaodong County. In the early years of the Western Jin Dynasty, Xiangping once again became the capital of Liaodong, and later changed to Pingzhou. During the Eastern Jin Dynasty, Liaoyang was successively occupied by Yan Qian, Qianqin, Houyan, Goguryeo and other local ethnic regimes.