I took the boarding box, but the stewardess said mine was super.

If it exceeds the specified size, it needs to be checked on the plane.

You only need to pay the excess baggage fee for the excess baggage. At present, the free baggage of domestic flights can accommodate 40 kilograms of first class, 30 kilograms of business class and 20 kilograms of economy class. In addition to checked baggage, passengers can also choose to carry things with them. Very convenient.

Generally speaking, you can carry two items in first class, but only one item in business class and economy class, but the weight of each item shall not exceed 5 kg and the volume shall not exceed 20 cm× 40 cm× 55 cm. You can take some valuables and fragile items with you that are inconvenient to put in checked baggage.