Items that are not recommended or can't be checked mainly include:

1. Small valuables: cash, securities, money orders, credit cards, jewelry.

2. Emergency articles: medicines, keys, passports, traveler's checks and business documents.

3. Irreplaceable items: manuscripts and family heirlooms.

4. Fragile products: glasses, glass containers and liquids.

The above items should be carried with you or put in the carry-on luggage that can be placed under the seat. The airline shall be responsible for the loss or damage of the above-mentioned items carried in the checked baggage according to the ordinary checked baggage.

Passengers are not allowed to carry controlled knives on board. Sharp or blunt tools other than controlled knives should be checked with the checked baggage and cannot be carried with you. The charging treasure cannot be checked. Prohibited articles, restricted transport articles, dangerous goods, and other articles with peculiar smell or easily polluting aircraft as stipulated by the state shall not be checked as baggage or sandwiched in luggage.