The first stage of compilation: designed in the 1970s, the information of imported goods can be directly input into the central computer system of the customs, and at the same time, it can be correlated with relevant documents processed by hand for subsequent inspection and final customs clearance.

Phase II compilation: 1989 update. In most cases, "paperless" processing can be realized without paper customs clearance documents. 95% of import customs clearance work no longer requires customs staff to personally check documents.

2. Undershipment: Some goods that have been listed in the loading list and should be shipped within the specified time cannot be shipped as agreed due to various reasons.

Shortage: the goods failed to be loaded at the appointed unloading port according to the agreed time.

Overloading: goods are not unloaded at the designated port, but stored in the designated space until they are unloaded at a port behind the designated port.

3. Foreign exchange control: Some countries restrict imports by limiting the amount of foreign exchange or foreign currency that can be used to pay for imported goods. Imported goods are usually divided into basic supplies, non-basic supplies and luxury goods.

The amount of foreign exchange used is calculated according to the import amount of basic materials needed at the same basic exchange rate, and the limited amount of foreign exchange used to import luxury goods (such as foreign cars) is usually converted at a higher foreign exchange rate.

4. Border trade statistics: This statistical data is reflected in domestic consumption, with imports as the entry and exports as the entry.

5. Copyright Law: Protect content creators and their materials from being copied and stolen by unauthorized individuals or institutions.

Commercial (Trade) Law: Ensure that consumers have the right to know the origin and composition of imported goods. All goods shall be marked with the origin and composition information in a prominent position. Customs allows the relabeling of goods without relevant labels, but will detain goods with false labels.

Trademark law: protect consumers by importing goods with registered trademarks to ensure that consumers get what they want.

6. E.D.I. (Electronic Data Interchange) technology: Electronic data is transmitted by computer instead of the original paper transmission.

7. Plant quarantine: implemented according to the standards stipulated by law, with the purpose of ensuring the safety of imported plants or agricultural products. Applicable to all goods made of living or dead plant materials, including food raw materials, medicines, flowers, potted plants, toys made of straw, soil and sand, grain seeds, etc.