The boarding box is a kind of trolley case, but the trolley case may not always be boarding. The so-called registration box is only less than the provisions of the airline can carry the luggage directly with the plane. More than this size must go to the check-in counter baggage. So the so-called boarding box refers to a certain size range of the trolley. The concept of ordinary trolley case is more broad, ranging from small, may not be able to carry the plane. But now domestic flights carry the size of the luggage trolley and not very strict inspection, generally not too large but larger than the size of the registration box can be brought up.
1: The boarding box is not necessarily as light as possible, it is important to be strong, because you may want to check it in. But:
Economy class adults and children passengers can check two pieces of luggage free of charge, each sum of the three sides of not more than 158 cm, the sum of the two pieces of luggage shall not exceed 273 cm, the weight limit of each baggage is 23KG; First Class passengers, Cabin passengers can check two pieces of baggage free of charge, the sum of each side should not exceed 158 cm, the weight limit of 32KG. In addition, you note: "the sum of the three sides" is not the circumference, but the length + width + height.
If one side exceeds 4 cm, but the whole did not exceed 158CM does not matter.
Wheel generally not.
2: Checked things if overweight, is in accordance with "kg / ticket full price X1.5%", that is: If your ticket is 2000 yuan, then more than 1 kg is 30 yuan!www.chinaluxgen.net