Hong Kong-listed PCB concept stocks fell in early trading, with Kingboard Laminates (01888.HK) down more than 11%, Guanghe Technology (01989.HK) down more than 8%, Kingboard Holdings (00148.HK) and Shenghong Technology (02476.HK) down more than 7.5%, and Han's CNC (03200.HK) down more than 6%.