Daqing Oil worker emphasizes study, innovation By TIAN XUEFEI and ZHOU HUIYING in Harbin | China Daily | Updated: 2021-05-17 08:37 Share CLOSE Liu Li repairs a valve at Daqing Oilfield in Heilongjiang province. [Photo provided to China Daily] Six months later, Liu Li still feels a thrill when she remembers the moment she received the National Role Model Worker medal at a gathering in Beijing's Great Hall of the People in honor of model workers and other exemplary individuals last November. In fact, the industrious 47-year-old has received a number of awards for her work ethic, professionalism and technical innovations since joining the second oil extraction plant at the Daqing Oilfield Company, a subsidiary of the China National Petroleum Corp, in 1993.