If there is no food on the plane, there is water to drink. You can buy hamburgers directly after Baiyun Airport. I suggest you eat directly after the security check before boarding the plane. Remember not to buy coke. Those who fail to pass the security check will have water to drink after the security check, free of charge. Check your luggage and change your boarding pass to see if there are many people waiting in line. If it is you directly, it will take 3-4 minutes. You'd better not bring hamburgers on the plane. The smell is too strong, and they are K.