Group 1 - China National Petroleum Corporation (CNPC) has applied for a patent for a heat storage device, indicating its focus on energy storage technology [1] - The patent application was filed on June 2025, and the device aims to improve heat storage efficiency through its innovative design [1] - CNPC Shenzhen New Energy Research Institute, established in 2021, has a registered capital of 100 million RMB and has engaged in 560 bidding projects [1] Group 2 - China National Petroleum and Natural Gas Corporation, founded in 1999, has a registered capital of approximately 18.3 billion RMB and is primarily involved in oil and gas extraction [2] - The company has invested in 1,285 enterprises and participated in 496 bidding projects, showcasing its extensive operational footprint [2] - CNPC holds 5,000 patents and has 169 administrative licenses, reflecting its strong emphasis on innovation and regulatory compliance [2]