1. What can't be taken in airport security:

(1) Military guns and official guns: pistols, rifles, submachine guns, machine guns, riot guns, etc. Civil guns: air guns, shotguns, sports guns, anesthesia injection guns, starting guns, sample guns and props. Baton, military or police dagger, bayonet. Steel ball gun, tear gas gun, stun gun, stun gun, defender;

(2) Bombs, grenades, flares, incendiary bombs, smoke bombs, signal bombs, tear gas bombs, gas bombs and bullets. Explosives, detonators, fuzes, detonating cords, non-conductive blasting systems, blasting agents, etc. Fireworks products: fireworks, fireworks and firecrackers;

(3) Controlled knives: refers to the knives listed in 1983 Interim Provisions on Controlling Some Cutters promulgated and implemented by the Ministry of Public Security with the approval of the State Council, including daggers, triangular knives, knives with self-locking devices and single-edged, double-edged and triangular sharp knives that look like daggers but are longer than daggers. Tibetan knives and waist knives that ethnic minorities need to wear and use because of their living habits belong to controlled knives and are only allowed to be sold and used in ethnic autonomous areas;

(4) bottled compressed gas and liquefied gas, such as hydrogen, oxygen and butane. Spontaneous combustion articles of yellow phosphorus, white phosphorus, nitrocellulose, oiled paper and its products; Metal potassium, sodium, lithium, calcium carbide, magnesium and aluminum powder will burn articles in contact with water. Flammable solids of gasoline, kerosene, diesel oil, benzene, ethanol, paint, thinner and rosin oil. Sodium peroxide, potassium peroxide, lead peroxide, peracetic acid, inorganic and organic oxidizer;

(5) cyanide, toxic pesticides and toxic substances;

(6) sulfuric acid, hydrochloric acid, nitric acid, liquid storage battery, sodium hydroxide and potassium hydroxide;

(7) Radioactive substances, such as radioisotopes;

(8) Articles that endanger flight safety, such as strongly magnetized articles that interfere with the normal work of various instruments on the plane, articles with strong pungent smell, etc.

2. The definition of food is: substances that can be eaten or drunk by human beings, including processed foods, semi-finished products and unprocessed foods, excluding tobacco or substances only used as medicines;

3. The airport security check does not prohibit eating.

To sum up, airport security can bring meals.

Extended data:

Precautions for flight:

1. If you don't have to reimburse yourself, you don't have to pick up the ticket. You can go through the registration formalities directly with your ID card. If you want to pick up the ticket, you can pick it up at the ticket office of the terminal at any time, just need your ID card.

2. Check-in can only be done between 2 hours and 30 minutes before departure;

3. Change your boarding pass and check your luggage at the check-in counter in the lobby. If your luggage is overweight, you can choose to pay the overweight fee or take some luggage with you to avoid being overweight.

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