I went from Baiyun Airport to Chaoshan Airport. Can I carry my backpack, computer bag and 20-inch suitcase on board? Don't check it

Check-in is free. You can wear this dress on the plane, but you still have a little more. Please check in and check in a 20-inch box, so you will feel relaxed after boarding. Go to the airport first and get your boarding pass at the check-in counter of the airline that bought the ticket. After boarding the plane, get your boarding pass with your ID card and wait at the security checkpoint. After passing the security check, enter the waiting area, wait for boarding according to the boarding gate shown on the boarding pass, and find it according to the seat number on the boarding pass.