中富电路：公司形成并拥有多项自主研发的核心技术，涉及高多层板、厚铜板等产品

Group 1 - The company has developed multiple core technologies through independent research and development, including high multilayer boards, thick copper boards, 5G antenna boards, high-frequency and high-speed boards, rigid-flex boards, embedded device boards, and PSIP products [2] - The company emphasizes its advanced materials, manufacturing processes, electrical parameter design and control, and quality control technologies [2] - The company encourages stakeholders to pay attention to future announcements regarding business expansion progress [2]