Checked baggage is with the airplane.
Checked baggage for airplanes is the same plane, general baggage and people are the same plane, the upper part of the plane is the passenger cabin, the lower part is the baggage cargo compartment.
General baggage and people are the same aircraft, the upper part of the aircraft is the passenger cabin, the lower part is the baggage cargo compartment but due to the actual mode of operation of the civil aviation industry, the different operating norms between the airlines and airports, as well as other (such as weather reasons, etc.) some force majeure factors, it does lead to baggage did not arrive on the same aircraft occurs.
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Aircraft check-in baggage is along with the flight aircraft you take off, together with the destination, because the aircraft check-in baggage is you at the check-in counter window check-in formalities, receive boarding passes, at the same time, check-in baggage formalities.
Staff in the weighing of your luggage at the same time to print out the same flight with your boarding pass two copies of the label, a copy of the baggage pasted in your check-in, a copy of the boarding pass pasted to your hold, down the plane to pick up the check-in for the baggage to be checked by the exit staff can go out after the error.