China A-share PCB concept stocks slump; Chongda Technology hits limit down

The breadth of the move matters more than the single limit-down: declines spanning Chongda, Yinxi, Chenghe, Weiergao, Hangdian, Jingwang and Dongshan point to a sector-wide repricing rather than an issue-specific reaction, which suggests sentiment toward the PCB supply chain as a group is being reset. The timing — an afternoon acceleration during volatile trading — hints at momentum-driven selling rather than a discrete catalyst. Whether the weakness stays contained to PCB names or spreads to adjacent electronics suppliers is the open question worth tracking.