On this day, 45 years ago, on January 28, 1980 (December 11, 1979 in the lunar calendar), Liaohe Oilfield was completed and put into operation. Liaohe Oilfield is located in the middle and lower reaches of Liaohe River plain, distributed in Panjin, Jinzhou, Shenyang, Anshan, Liaoyang, Yingkou and other areas, and is the third largest oil and gas field in China.