Landscape city, ecological Liaoyang. Liaoyang is a place with mountains and water and rich products. There are remnants of Changbai Mountain in the east, with dense forests and rich vegetation. There are many iron-rich mines in the south; The west is a plain where the three rivers meet and are easy to cultivate. The north is submerged by the Taizi River and the Hun River, and the water system is developed, leading directly to the sea. With its unique geographical conditions and rich resources, Liaoyang has long been a central city, transportation hub and military fortress in Liaodong and even Northeast China. In the first quarter, the city's ecological environment quality rose steadily. The average concentration of air quality PM2.5 in the city is 49.9 μ g/m3, and the number of days when air quality reaches the standard is 72 days, accounting for 80% of excellent days, ranking fifth in the province. The proportion of surface water quality in the state-controlled section of the city is better than Grade III water quality is 75%, and the water quality in the river sections above the municipal level is better than that in the same period last year. The circulation mechanism of construction land was further improved, and the investigation and evaluation of soil pollution in seven key construction land were completed. The safe utilization rate of key construction land in the city remained at 100%. 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.