For domestic logistics, international logistics mainly includes the links of China's export customs clearance and destination country's import customs clearance. The product name, customs code, quantity and other information are truthfully reported to China Customs, destination country's import customs and relevant departments. Value information is generally declared in USD or in the currency used in the destination country, such as EUR, euro, GBP, pound sterling, etc. The customs code used by Chinese customs is 10 digits, and that used by European and American customs is generally 8 digits. Sometimes the customs code used for the same product in China is slightly different from that used in Europe and America (the first 8 digits)