Group 1 - The company, Yimikang (300249), emphasizes its collaboration with the three major telecom operators, providing them with critical equipment, engineering technology, software services, and smart services [1] - Yimikang identifies itself as a service provider for the entire lifecycle of digital infrastructure green solutions, offering key equipment such as power distribution systems, including UPS, precision distribution, and batteries [1] - The company highlights its focus on important clients, particularly the three major telecom operators, indicating a strategic priority in its business model [1]