I'm going to study in Seoul, South Korea by plane from Beijing in two days, but there are too many things. I want to ask professionals to help me answer some questions:

According to my experience, this is more reliable. Let's report first and see what he says. Sometimes if there are not many people on this plane, it will be relatively easy, depending on people's luck. I'm over 6KG at most. The backpack must be ok, it must be. I don't recommend that nice little bag. Not practical. I really forgot the specific size of the box on the plane, and most people who sell bags know it. The weight is 10KG, which can be slightly exceeded. Usually no one will check it, as long as you mention it yourself. The rest are overweight, and all the valuables are on their shoulders. That basically won't check the weight.

PS, did you buy a power adapter? Many children who have been to Korea before forget this.