1. Know the situation: Know why the passport was taken away by the customs. It is because of violation of relevant laws and regulations or the need of frontier inspection and safety inspection. Knowing the specific situation helps to take appropriate action.
2. Communication with the customs: contact the relevant customs departments and consult the specific handling procedures and requirements. Provide accurate and detailed information so that you can give correct guidance and help you get your passport back.
3. Cooperate with the investigation or inspection: If the passport is taken away due to illegal acts or security needs, actively cooperate with the investigators or security personnel to complete the necessary procedures and steps.