Printed circuit boards (PCBs) are essential substrates for assembling electronic parts, connecting points, and components on a common base material. They play a crucial role in forming circuit connections and transmitting signals in electronic products, making them the key electronic interconnection in the industry. The PCB industry reflects the development speed and technical level of the electronics industry in a country or region. Fiberglass cloth, copper foil, and copper clad laminate are important raw materials for PCB production, with the copper foil prices influencing the overall cost of PCBs. The CCL and PCB industries require substantial capital investment and possess significant bargaining power in the market. High-end PCB segments like HDI demand advanced management and technological capabilities, while outsourcing services are prevalent for low-end products.