May I ask if there is free checked baggage at the airport?

This has nothing to do with the airport, it has something to do with the airline, and generally non-budget airlines have free baggage allowance.

If you need to purchase baggage allowance when purchasing a cheap airline ticket, it is more favorable to purchase it in advance on the official website; several major airlines (Air China, China Eastern Airlines, China Southern Airlines, Hainan Airlines) have 20 kg of free checked baggage. When purchasing tickets, there are instructions on luggage and refunds...<br/><br/>Help you, please click green to accept!

There is no free luggage at the airport. If the ticket includes a checked baggage allowance, the checked baggage (on the same flight as the person) within the allowance is free.