Airlines to civil aviation aircraft carried by passengers checked baggage have strict rules, folded trolleys can not exceed the rated weight, volume, not with dangerous contraband. Domestic and international flights and vary. Domestic flights: according to regulations, folding baggage checked each no more than 50 kg, volume is no more than 40 cm & times; 60 cm & times; 100 cm, 30 kg each passenger is free checked baggage allowance for first class, economy class is 20 kg, infant ticket passengers no free baggage allowance. 5% extra charge. Well checked folding baggage should be packed, tied up, luggage cannot be attached to the other items, bamboo basket, mesh bags, straw rope, sack cannot serve as outer packing materials, such as luggage to set forth the passenger name, detailed address and phone number. International flights: international flights go coach ( 经济类) Each free checked baggage is 20 kilos. First class, 第一个类) 30 kg per person. Baggage to lock, the valuables, documents, don't put into cash. And the name tag ( 名称标签) Fill out the name, address, starting point and end point. Hang in or on the baggage, in case of loss. May be security checks before folding baggage check, after checked shall properly keep luggage tag ( 行李检查) The number to correspond with the baggage number.