强达电路：公司主营业务为印制电路板（PCB）的研发、生产和销售

Core Viewpoint - The company, Qiangda Circuit (301628), focuses on the research, production, and sales of printed circuit boards (PCBs), primarily targeting mid-to-high-end sample and small batch products [1] Group 1: Business Model - The company operates with an order-driven core orientation rather than a customer scale orientation, emphasizing the development of high value-added orders [1] - The company enhances unit output value through technological innovation and product upgrades [1] Group 2: Customer Base - Currently, the company serves nearly 3,000 active customers, indicating a broad customer base [1] - The concentration of the top five customers is at a low level, mitigating the risk associated with customer concentration [1]