Before flying to Korea, which baggage details should travelers confirm directly with the airline?

Kapy's editorial team reconstructed this discussion from a recurring Chinese or Vietnamese community need about confirming airline baggage rules before a Korea flight. It is not a repost, does not represent a collected user, and contains no copied comments or personal data. If you have handled a similar case recently, please share only the official channel you checked, the year, the location, and the order of confirmation. Do not post passport details, account numbers, application IDs, addresses, or document images. A personal experience cannot predict another person's outcome, so readers should verify current requirements directly with the responsible institution before acting.