Content: Prioritize suppliers with both “import and export operation rights” and “professional agency qualification for construction machinery”. These suppliers should be familiar with the Specifications for Filling in Customs Declaration Forms for Import and Export Goods and the supervision requirements for construction machinery products (e.g., large excavators must comply with the Guidelines for Inspection and Supervision of Imported Used Large Construction Machinery), and entrust them to handle the entire process of customs declaration, inspection declaration, and tax payment to avoid declaration errors caused by unfamiliarity with the process. Communicate with customs authorities 3 months in advance to confirm the equipment classification and clarify the HS code (e.g., the HS code for crawler excavators is 84295212; confirm whether it belongs to “key used mechanical and electrical products”, and if so, apply for the Import License in advance). At the same time, confirm the customs duty rate (such as MFN rate, provisional rate) and value-added tax rate to accurately calculate tax costs. When preparing declaration materials, ensure “consistency of three documents” (consistency of information in the customs declaration form, bill of lading, and invoice). The certificate of origin must be issued by the official institution of the exporting country (e.g., the certificate of origin for South Korean equipment must be issued by the Korea Customs Service), and the packing list must detail the equipment model, quantity, weight, size, and spare parts list to avoid customs inspection and detention due to incomplete materials. If the equipment involves “CCC certification”, apply for the certification 6 months in advance to ensure smooth customs clearance after the equipment arrives and avoid affecting the delivery schedule.