The size of the carry-on suitcase shall not exceed 55 cm *40 cm *20 cm, and the weight shall not exceed 5 kg. However, as long as your hand luggage is not heavy when you board the plane through the security machine, you won't ask. Besides this luggage, you can also carry a laptop, a camera or telescope, a book and a coat, and a small bag for carrying your belongings and certificates.
If you need reimbursement, you can print a trip to travel itinerary at the airline ticket counter where you booked the ticket.
After checking in, go to the security check according to the security check area on the boarding pass, put your carry-on baggage on the conveyor belt of the security check machine, and put your metal objects in the plastic basket for physical security check. Take everything away after the security check, don't forget. Then wait for boarding near the boarding gate specified on the boarding pass.
After boarding the plane, put your carry-on boarding box in the closed luggage compartment above the seat or below the front seat, fasten your seat belt, turn off your mobile phone and wait for the plane to take off.
After arriving at the destination airport, there is a baggage carousel in the arrival hall. It will be displayed according to flight number. Wait for your baggage in front of the baggage carousel of your flight. Generally speaking, your luggage can be picked up half an hour after the plane arrives. Remember to take all your luggage, don't forget.
I hope you have a wonderful trip!