Group 1 - The core point of the article is that Weichai Power Co., Ltd. has obtained a patent for a "fault diagnosis method, device, equipment, and storage medium for injection valves," with the authorization announcement number CN116906239B, and the application date is August 2023 [1] Group 2 - Weichai Power Co., Ltd. was established in 2002 and is located in Weifang City, primarily engaged in the automotive manufacturing industry, with a registered capital of 87,156.71296 million RMB [1] - The company has invested in 64 enterprises, participated in 5,000 bidding projects, and has 736 trademark records and 5,000 patent records, along with 778 administrative licenses [1] Group 3 - Weifang Weichai Power Technology Co., Ltd. was established in 2017, also located in Weifang City, focusing on research and experimental development, with a registered capital of 17,600 million RMB [1] - This subsidiary has participated in 6 bidding projects, holds 879 patent records, and has 3 administrative licenses [1]