1. Boxed milk cannot be taken on the plane. No matter international or domestic airlines, boxed milk belongs to liquid dairy products. If you take this milk on the plane, you'd better drink it and wait for the plane, otherwise it will stay at the security checkpoint.

There are strict restrictions on flying, and some things can't be taken on the plane. Passengers on domestic flights are prohibited from carrying liquid articles with them, but they can deliver them, and their packaging should comply with the relevant provisions of civil air transport.

3. Passengers can carry a small amount of cosmetics for their own use. Each piece of cosmetics is limited to one piece, and its container volume shall not exceed 100 ml. They should be put in different bags and then opened for inspection.

4. Infant liquid dairy products are not provided on Air China. Passengers with babies should ask the sales staff when booking or issuing tickets, and bring their own milk powder according to their own needs.

Passengers who need to apply for baby catering must apply 24 hours before the flight takes off.

6. If it is an overseas passenger, the duty-free liquid articles brought into the country should be put in a transparent plastic bag with intact bags and sealed, and can only be carried after showing the shopping voucher.