In 2023, the ethylene output of Changqing ethane-to-ethylene plant in Lanzhou Petrochemical Company exceeded 800,000 tons, which indicated that Changqing ethane-to-ethylene project achieved the production goal of "affordable, stable and long-term", which was a milestone for the development of the company's ethylene industry.

Changqing ethane-to-ethylene plant of Lanzhou Petrochemical Company is the first large-scale ethane-to-ethylene production plant built in China with the independent research and development technology of China Petroleum. It was completed and put into operation on August 3, 2021. Over the past two years, employees have continuously optimized production indicators, and the production potential of the device has been continuously released, with remarkable results in improving quality and increasing efficiency. The ethylene yield and energy consumption index level of the unit are in the forefront of similar units of the Group Company, and it has been rated as a benchmark device for "energy efficiency" and "water efficiency" by China Petroleum and Chemical Federation.

In 2023, Lanzhou Petrochemical continued to promote management improvement, adhered to goal-oriented, problem-oriented and result-oriented, established cooperation mechanism with upstream ethane supplier, established linkage management mechanism with business contractor, and established integrated production and operation mechanism with inspection, maintenance and operation unit, which laid a solid foundation for the long-term stable operation of the plant under high load. Cadres and employees actively carry out difficult problems, carry out technical transformation, crack the bottleneck of the device, and effectively release productivity; Careful inspection, careful monitoring and precise operation to avoid production fluctuation, timely find hidden dangers and make rectification to ensure the smooth operation of the device; Actively pay a return visit to major distributors, listen to opinions with an open mind, constantly improve product quality and establish a good brand image.