Group 1 - The company, Electric Power Research Institute (300215.SZ), specializes in high and low voltage electrical equipment testing services, with high voltage testing services accounting for 70% to 80% of its business [1] - The company has been deeply engaged in the testing industry for many years, establishing itself as a benchmark in testing standards and capabilities [1] - For detailed operational information, the company advises stakeholders to refer to its regular reports, specifically the "Management Discussion and Analysis" section [1]