General administration of customs base. According to official website, the General Administration of Customs of the People's Republic of China, we know that we will go to the base of the General Administration of Customs to learn about the training content and explore the training base. Customs is an administrative agency established by a country at coastal, border or inland ports to implement import and export supervision. Supervise and inspect inbound and outbound postal articles, goods, passengers' luggage, currency, gold and silver, securities and means of transport, collect customs duties, and carry out tasks such as banning smuggling.