This depends on the country you are traveling to. Before your trip, please check the official website of the relevant customs authority to learn which items are prohibited for import/export. Make sure you are not carrying any restricted items.
For the safety of all passengers, dangerous goods and hazardous materials are strictly prohibited on board. You can find more detailed information.
We strongly advise against placing fragile items, perishable goods, cash, credit cards, securities, jewelry, or precious metals in your checked baggage. Please keep important documents, passports, ID cards, keys, and other valuables in your carry-on baggage. If you wear contact lenses or require medication, we also recommend packing these items in your hand luggage rather than your checked bag.