China A-share PCB stocks rally; Guangyang Co hits 3-day limit-up, record high

The striking feature is the narrowness of the move: one name locked at the daily limit for a third session while the rest of the PCB complex posts solid but unremarkable gains, suggesting a single-stock story rather than a sector-wide re-rating. Without any stated catalyst in the material, the rally's durability is the open question — momentum concentrated in one limit-up name can unwind as quickly as it built. Whether the broader PCB group follows Guangyang higher, or the strength stays isolated, is what to watch.