What happened

A small archival sidebar revisits a 1986 incident described as a Chinese incursion and marks it as a 40 years ago reference. The item is a historical recap, not a current news development.

Background and earlier position

The visible archival box was meant to provide historical context for older border-security tensions. The visible material does not make the exact date, location, or operational details clearly readable, so only the broad historical reference can be retained.

What changed now

The current publication has surfaced the older incident as an anniversary-style memory item. No new policy announcement, diplomatic step, or security decision is visible in the supplied material.