中远通：公司主营通信电源、工控电源、新能源电源及其他电源的研发、生产和销售业务

Group 1 - The company, Zhongyuan Tong (301516), specializes in the research, production, and sales of communication power supplies, industrial control power supplies, new energy power supplies, and other power supplies [1] - The company's products are widely applied in various fields including communication, new energy, and industrial control, indicating a broad downstream application [1]