China A-share PCB stocks extend decline; Zhongjing Electronics hits limit-down

The breadth of the pullback matters more than any single name: a limit-down alongside a cluster of 5%+ declines points to sector-wide de-risking in PCB concept stocks rather than an isolated earnings or company event. That pattern suggests positioning unwinds are driving the move, which tends to hit smaller, more crowded names hardest. Whether the selling broadens further into the rest of the A-share electronics supply chain, or stays contained to the PCB theme, is the open question worth tracking.