For international airlines, it is stipulated that first-class and business-class passengers can carry two personal belongings each, and the weight of each item should not exceed 8 kg (17 lbs); Each economy class passenger can take one carry-on item, and the weight shall not exceed 5 kg (1 1 lb). The length, width and height of each carry-on article shall not exceed 55cm (22 inches), 40cm (16 inches) and 20cm (8 inches) respectively, so as to be placed in the closed luggage rack above the aircraft cabin or below your front seat.
Size of ordinary checked baggage for domestic transportation: the length, width and height of each piece of luggage shall not exceed 100 cm (40 inches), 60 cm (24 inches) and 40 cm (16 inches) respectively.
If it cannot be placed in the above way, or because it is overweight, oversized, or for safety reasons, it should be transported as checked baggage.
Extended data:
Catalogue of prohibited articles carried and checked by civil aviation passengers
1, guns and other weapons (including main parts):? Devices capable of firing ammunition (including projectiles and other articles) and causing serious personal injury or articles that may be mistaken for such devices;
2. Exploding or burning substances and equipment:? Explosive or burning devices (substances) that can cause serious personal injury or endanger the safety of aircraft or articles that may be mistaken for such devices (substances);
3. Control equipment:? Control instruments that can cause personal injury or cause great harm to aviation safety and transportation order;
4. dangerous goods:? Dangerous goods that can cause personal injury or cause great harm to aviation safety and transportation order;
5. Other projects:? Other articles that can cause personal injury or cause great harm to aviation safety and transportation order.
References:
Catalogue of prohibited articles carried and checked by civil aviation passengers
Catalogue of articles restricted by civil aviation passengers.