Group 1 - The State Intellectual Property Office of China granted a patent to China National Petroleum Corporation (CNPC) for a "foldable cage ladder with pedals," with the authorization announcement number CN117948037B and application date in October 2022 [1] - CNPC, established in 1990 and headquartered in Beijing, primarily engages in oil and gas extraction, with a registered capital of 48.69 billion RMB [1] - CNPC has made investments in 109 companies, participated in 5,000 bidding projects, holds 1,439 trademark registrations, and possesses 5,000 patents, along with 28 administrative licenses [1] Group 2 - China National Petroleum Group Bohai Petroleum Equipment Manufacturing Co., Ltd., founded in 2008 and located in Tianjin, focuses on specialized equipment manufacturing, with a registered capital of approximately 619.77 million RMB [1] - The Bohai Petroleum Equipment Manufacturing Co. has invested in 28 companies, participated in 2,775 bidding projects, holds 32 trademark registrations, and has 1,529 patents, along with 3 administrative licenses [1]