When entering the security checkpoint, they ask to check and weigh your carry on and personal items together. If the total weight
is over 12.5 kg per person, they kicked you out of the long line. You would need to re-enter and be rechecked. But the rule is not legitimate, the personal items should not be considered into total weight. And the staffers got very impatient and ignore you if you try to communicate via English, but it is an international airport.