Group 1 - The State Intellectual Property Office of China shows that China National Petroleum Corporation (CNPC) has applied for a patent titled "Control Circuit for Delayed Shutdown of Main Motor During Cooling Fan Failure," with publication number CN121273669A and application date of July 2024 [1] - The patent involves a control circuit that allows for a delayed shutdown of the main motor for 2 hours after a cooling fan failure, enabling production personnel to switch to a backup pump, thereby significantly reducing the likelihood of main motor shutdown due to cooling fan issues [1] Group 2 - According to Tianyancha data, CNPC was established in 1999 and is based in Beijing, primarily engaged in oil and gas extraction [2] - The company has a registered capital of 18,302,097 million RMB and has invested in 1,296 enterprises, participated in 443 bidding projects, and holds 38 trademark records and 5,000 patent records, along with 168 administrative licenses [2]