Probably also 10, if you go to the plane, remember not to overweight and oversize
According to the relevant provisions of civil aviation, items that aircraft passengers can carry with them are:
Unchecked baggage should be able to fit under the passenger's front seat or in an enclosed luggage rack.
1. The weight of free carry-on items is limited to 10 kilograms per first class and business class passengers and 5 kilograms per economy class passenger.
2. Passengers holding first-class and business class tickets may each carry two items with them; passengers holding economy class tickets may only carry one item with them. The length, width and height of each carry-on item shall not exceed 55CM, 40CM and 20CM, respectively, and the total weight shall not exceed 5 kg.
40l backpack can hold much clothes There are two types of free baggage and consignment. The two types add up to only 15 kilograms. The size of carry-on items does not exceed 20 cm X 30 cm X 40 cm and the weight does not exceed 5 kg (1 piece only). Checked baggage sizes do not exceed 40 cm X 60 cm X 100 cm and the weight does not exceed 10 kg. Excess baggage fees must be paid for the overweight portion, which is calculated at 1.5% per kilogram of the economic class fare announced by the State.