Hong Kong-listed PCB concept stocks retreated, with Shenghong Technology (02476.HK) falling over 10%, Xinge Microelectronics (09630.HK) falling over 6%, Han's CNC (03200.HK) falling 3%, Dingtai Hi-Tech (01377.HK) falling over 2%, and China National Building Material (03323.HK) falling over 1%.