强达电路：公司主营业务为PCB的研发、生产和销售

Core Viewpoint - Strongda Circuit (301628) has been deeply engaged in the PCB industry for twenty years, focusing on the R&D, production, and sales of PCBs, particularly in the mid-to-high-end sample and small batch boards, holding a leading position in the domestic sample market [1] Group 1 - The company emphasizes independent innovation and R&D investment, closely monitoring changes in market application trends [1] - The company proactively conducts technological layout and deepens technological reserves to maintain long-term market competitiveness through continuous R&D investment [1]