Additionally, there are two types of air carriers: cargo (pets walk alone pets and their owners) and random baggage check-in (pets as a piece of the owner's baggage checked in with the airplane they are traveling on). Freight needs to be in accordance with the requirements of the local corresponding airlines to book space in advance, according to the required time to hand over the freight, random need to be in accordance with the corresponding airlines to buy a ticket when the application to carry pets, two hours before the departure of the aircraft check-in at the same time as the pet can be handled check-in.