Group 1 - PCB concept stocks experienced a local surge, with Jinbai Ze hitting a 20% limit up, Helitai also reaching the limit up, and Shengyi Electronics rising over 7% [1] - Guojin Securities research report indicates that the price of copper-clad laminates is increasing, maintaining a positive outlook on the AI-PCB industry chain [1] - The price increase of copper-clad laminates has begun, with companies such as Jiantao, Weilibang, and Hongruixing all raising prices by 5-10 yuan per sheet as of August 15 [1] Group 2 - The demand for AI is driving price increases in PCB drill bits and copper foil, indicating a strong correlation between AI demand and PCB materials [1] - Upgrades in servers and switches to M8/M9 materials are significantly increasing the value per unit, suggesting a growing market opportunity [1] - Equipment, electronic cloth, and copper foil are all benefiting from the sustained high prosperity of the AI-PCB industry chain [1]