Core Viewpoint - China National Petroleum Corporation (CNPC) has successfully developed and launched its first self-developed large temperature difference transcritical carbon dioxide air source heat pump unit, marking a significant advancement in the industrial application of heat pump technology in China [1] Group 1 - The heat pump unit is rated at hundreds of kilowatts and has been successfully tested and put into operation at the Changqing Oilfield [1] - The development was carried out by CNPC's Shenzhen New Energy Research Institute, showcasing the company's capability in transitioning from laboratory research to industrial application in the field of large temperature difference heat pump technology [1]