1. Liquid and gel articles: especially cosmetics, toothpaste, shampoo, etc. The capacity is less than 100 ml, and it needs to be packaged separately in transparent plastic bags.

2. Metal objects: including mobile phones, keys, watches, coins, etc. Because these items are made of metal, they will interfere with the normal work of security inspection equipment, so they need to be taken out separately for inspection.

3. Charging treasures, batteries and other items: These items need to be taken out separately for inspection to ensure that they meet safety standards and there are no contraband or dangerous goods installed.

4. Umbrella, crutches and other items: These items sometimes need to be inspected, especially those made of metal or other materials that interfere with security inspection equipment.

5. Valuables: such as jewelry, money and other valuables, put them in hand luggage and carry them at any time to avoid loss or damage during security inspection.

6. Other items: such as backpacks, handbags and other personal belongings, which need to be checked during security inspection. When security personnel find suspicious items, they need to ask to open the package for further inspection.