On December 4, Gelonghui reported that Qiangda Circuit (301628.SZ) stated on the investor interaction platform that the company's high-end PCB products made with special processes or materials mainly include high multilayer boards, high-frequency boards, high-speed boards, high-density interconnection boards (HDI boards), thick copper boards, rigid-flex boards, semiconductor test boards, and millimeter-wave radar boards, among others. The definition of small batch is printed circuit boards with an order area between 5 square meters and 50 square meters.