1947 In May, the People's Government of Inner Mongolia Autonomous Region was established, and the autonomous government of Dongkezhongqi was renamed as the People's Government of Dongkezhongqi, which was subordinate to the People's Government of Zhelimu League of Inner Mongolia Autonomous Region. Due to the war environment at that time, Dongkezhongqi was successively managed by Liaoji Province and Liaobei Province along with Zhelimu League. 1September, 949, Dongkezhongqi was no longer managed by northern Liaoning Province, but was under the jurisdiction of Inner Mongolia Autonomous Region, and the title of Horqin left-wing zhongqi was restored until the establishment of People's Republic of China (PRC).
Horqin Left Wing Zhongqi belongs to Tongliao City. There are Mongolian, Han, Manchu, Hui, North Korea, Daur, Ewenki and other 15 ethnic groups in Zuo Yi, Horqin. Among them, the Mongolian population is 395,000, accounting for 73.6% of the total population, making it the most populous county in China. On 20 16 12.7, Zuo Yi zhongqi in Horqin was listed as the third batch of national comprehensive pilot areas for new urbanization. 20 18, 18122 was selected into the list of pilot areas for the integrated development of rural primary, secondary and tertiary industries in 20 18. On March 4, 2020, the People's Government of Inner Mongolia Autonomous Region agreed that Horqin Left Wing Zhongqi would withdraw from poverty-stricken counties. In 20 19, Zuo Yi zhongqi in Horqin achieved a regional GDP of 654.38+02.875 billion yuan, a year-on-year increase of 3.5%.
Horqin Zuo Yi Zhongqi is located at the eastern end of Tongliao City, on the southeast edge of Daxing 'anling and on the north bank of Xiliaohe River, which is a transitional zone from Songliao Plain to Inner Mongolia Plateau. East-west length 19 1 km, north-south width 1 16 km, with a total land area of 981/km2. It is adjacent to Tongliao City and Horqin Left Wing Rear Banner in the south; The southwest borders Kailu County; Northwest is connected with Zhalute Banner; It borders Horqin Right Wing Zhongqi in the north and Tongyu County in Jilin Province; It is adjacent to Changling County and Shuangliao County in Jilin Province in the east and southeast.
Horqin left-wing middle banner belongs to plain landform. Under the influence of alluvial and aeolian factors, it has the characteristics of ups and downs, meadows, sand dunes, lakes and swamps. The terrain slopes from northwest to southeast. There is a hill named Glass Mountain on the border of Erensok Sumu in the southeast, which belongs to the basalt volcanic cone erupted in Cenozoic and Neogene. It is 259.3 meters above sea level, and the foot of the mountain covers an area of about 1.6 square kilometers. It is mainly plain landform, with micro landforms such as wind erosion, water erosion and volcanic cone, and the average elevation is between120 ~ 215m.
Horqin Left Wing Zhongqi belongs to temperate continental monsoon climate with four distinct seasons. In spring, the temperature rises quickly and the wind and sand are heavy; In summer, the rain and heat are synchronized and the rainfall is concentrated; Autumn is short and the temperature drops rapidly; Winter is dry and cold. The annual maximum temperature is 35.8℃, the minimum temperature is -25. 1℃, the annual average temperature is 7. 1℃, the frost-free period is 202 days, the annual sunshine is 289 1.7 hours, the rainfall is 269.7mm. The annual average temperature is 5.525℃. 1 month, the average daily temperature is-16.2℃ to-14.9℃, the extreme minimum temperature is -33.9℃, the average daily temperature in July is 23.7℃ to 24. 1℃, and the extreme maximum temperature is 39.8℃. The duration of annual average daily temperature above 5℃ is 188 days in the west, 197 days in the east, and the number of frost days below 0℃ is 136 days in the east and 149 days in the west. The average annual precipitation is 342.0mm in the west and 430.3mm in the east. Extreme precipitation, the maximum annual precipitation is 679. 1mm, and the minimum annual precipitation is169.9mm. ..