四会富仕：公司有部分PCB产品应用于光模块，公司不生产光模块

Core Viewpoint - The company primarily focuses on the research, development, production, and sales of PCBs, with some PCB products being used in optical modules, but it does not manufacture optical modules itself [2]. Group 1 - The company, Qihui Fushi (300852.SZ), confirmed its main business is PCB-related [2]. - There is a clarification that the company does not produce optical modules, only PCB products that may be applied in optical modules [2].