Checked baggage should not exceed 50 kilograms in weight and 40 x 60 x 100 centimeters in size per piece, and any baggage exceeding the above regulations can only be checked in with the prior consent of the carrier.
The weight of self-care baggage cannot exceed 10 kilograms, and the volume does not exceed 20 x 40 x 55 centimeters per piece. The weight of carry-on items is limited to 5 kilograms per passenger. Passengers holding first class tickets are allowed two pieces of carry-on items per person. The volume of each carry-on item shall not exceed 20 x 40 x 55 centimeters. Carry-on articles exceeding the above weight, number of pieces or volume limitations shall be checked in as checked baggage.
The free baggage allowance (including checked and self-cared baggage) for each passenger is 40 kilograms for first class passengers holding adult or child tickets, 30 kilograms for business class passengers and 20 kilograms for economy class passengers. There is no free baggage allowance for passengers holding infant tickets.
Expanded Information:
Some items are prohibited from being carried on board for air travelers, but may be checked as baggage. These items include kitchen knives, large scissors, large fruit knives, razors and other household knives that can be used to jeopardize aviation safety, professional knives such as scalpels, butcher knives, carving knives, knives, spears, swords, halberds and other knives used for performances by cultural and artistic units, as well as axes, chisels, hammers, awls, weighted or spiked walking sticks, iron-tipped hiking poles, and other sharp and blunt objects that can be used to jeopardize aviation safety.
There are specific regulations for the transportation of lithium batteries, and rechargeable batteries are equivalent to backup batteries. For spare lithium batteries for passengers' own portable electronic devices, if the lithium content of lithium metal batteries does not exceed 2g and the rated energy of lithium-ion batteries does not exceed 100wh, the number of spare batteries allowed to be carried by the passenger shall be judged by the reasonable number required for the use of the device during the trip.
If the rated energy of the lithium-ion battery exceeds 100wh but does not exceed 160wh, the number of spare batteries allowed to be carried by each passenger with the approval of the air operator shall not exceed two.
Baidu Encyclopedia - Civil Aviation Administration of China passenger baggage transportation rules
China News Network - professionals analyze the rules of carrying items on the plane: large fruit knife can be checked