PCB概念震荡拉升 奥士康涨停

Group 1 - PCB concept stocks experienced significant fluctuations and a rally on January 21, with notable performances from several companies [1] - Aoshikang reached the daily limit increase, while Guanghe Technology hit the daily limit and achieved a historical high [1] - Kexiang shares rose over 10%, with ShenNan Circuit, HuDian shares, BaoDing Technology, and JinAn Guoji also seeing gains [1]