Can Buck 731, a folding knife, pass the security check at the railway station?

you can't pass the security check.

according to the identification standard of controlled knives, controlled knives refer to daggers, triangular knives, spring knives (folding knives) and other similar single-edged, double-edged and triangular sharp knives. Folding knives are controlled knives and cannot pass the safety inspection.

the picture shows the detailed standards for controlling cutting tools: