According to the law, China Customs can take 20,000 RMB or less than 5,000 US dollars in cash (in foreign currency equivalent) when leaving the country. If it exceeds the amount, it is necessary to go through the declaration formalities in advance and apply for the carrying certificate from the designated foreign exchange bank, and the customs will release it with the carrying certificate stamped by the designated foreign exchange bank.

Airport security inspection refers to a personal and baggage inspection item that passengers on civil aircraft must accept before boarding, and it is also a necessary measure to ensure their own safety and the flight safety of civil aircraft in the air.