Group 1 - The company specializes in the research, production, sales, and maintenance services of air conditioning systems for rail transit vehicles, leveraging core technologies in energy-saving control, weight reduction, noise reduction, and intelligence [3][4] - The company has established a strong market position and recognition by providing variable frequency energy-saving air conditioning products that meet the needs of various rail transit vehicles [3] - The company is actively developing energy-saving air conditioning technologies and products for new application areas, including solutions for new energy vehicles, energy storage systems, smart grids, data centers, and agricultural drying [3][4] Group 2 - The company's variable frequency heat pump energy-saving technology demonstrates an average energy-saving capability of 30%, contributing to national goals of "carbon peak and carbon neutrality" [3][6] - The company has not made any changes to its accounting firm during the reporting period, and the audit opinion on the financial report is a standard unqualified opinion [1][2] - There are no preferred shareholders or significant changes in the top ten shareholders during the reporting period [7]