Chapter 84 covers nuclear reactors, boilers, machinery, mechanical appliances and their parts, and is one of the most technology-intensive chapters in the HS. This chapter includes power machinery, agricultural machinery, office machinery (such as computers), automatic data processing equipment and their components, and various types of specialized machinery. The chapter notes explicitly exclude certain electronic components (such as electric motors and electrical equipment of Chapter 85), but mechanical structural parts, housings, cooling modules, etc. of computers are generally classified in this chapter. Understanding Chapter 84 requires grasping the distinction between 'machines' and 'parts', as well as the classification logic of functionality and specificity. Heading 8473 covers parts and accessories suitable for use solely or principally with the machines of headings 8469 to 8472, including computers, typewriters, word-processing machines, calculators, automatic data processing equipment, etc. Parts under this heading must meet the 'specificity' condition, i.e., they cannot be general-purpose parts (such as screws, springs), and cannot be electrical components named in Chapter 85. 8473 is further subdivided into multiple subheadings, such as 8473.10 (parts of typewriters), 8473.30 (parts of computers and automatic data processing equipment), 8473.50 (parts of other office machines). This code 847350 belongs to the 'other' subheading, applicable to computer accessory parts not specifically named. Code 847350 is a 6-digit HS code. The first 2 digits '84' represent Chapter 84, i.e., nuclear reactors, boilers, machinery, mechanical appliances and their parts, covering all non-electrical mechanical devices. Digits 3-4 '73' represent heading 8473, i.e., parts and accessories suitable for use solely or principally with the machines of headings 8469 to 8472, the core being the concept of 'specific parts'. Digits 5-6 '50' represent subheading 8473.50, i.e., 'other' parts and accessories, used for residual items that belong neither to 8473.10 (parts of typewriters) nor to 8473.30 (parts of computers and automatic data processing equipment). Note: 8473.50 is a residual subheading, used only when parts cannot be classified under a more specific subheading. This code has been refined to 8-10 digits in some countries, but is uniform at the 6-digit international level. The key reason this commodity is classified under 847350 rather than 847330 is that its description as 'computer accessory parts' may point to parts specific to non-automatic data processing (ADP) equipment, or accessories that cannot be clearly classified under 8473.30. For example, certain computer peripheral devices (such as monitor stands, keyboard trays) may fall under 8473.50 if they are not parts of complete ADP machines. However, note: if parts are specific to ADP (such as hard disk drive brackets, motherboard mounts), they should be classified under 8473.30 first. 8473.50, as a residual subheading, applies to parts of other office machines (such as calculators, copiers), or computer accessories not specifically named. When classifying, it is necessary to check Chapter 84 notes and heading texts to avoid confusion with 8473.30.

Product Name: The Chinese and English names of the declared commodity, which must be specific to the function, such as 'computer cooling module' rather than 'computer parts'. Use: Explain what machine the part is specifically used for, such as 'specifically for laptop computers', 'for desktop computers'. Material: Main material composition, such as plastic, metal, composite materials, affecting classification and regulatory conditions. Brand: Manufacturer or brand name; if no brand, indicate 'no brand'. Model: Specific model or part number, used to identify uniqueness. Whether Specific Part: Declare whether it is specifically used for machines of headings 8469-8472, which is key to classification. Functional Principle: Briefly describe the function of the part in the complete machine, such as 'supporting motherboard', 'heat dissipation'. Customs declaration example: Product Name: Computer cooling module; Use: Specifically for laptop CPU cooling; Material: copper tube + aluminum fins + plastic fan; Brand: CoolerMaster; Model: CM-1234; Whether Specific Part: Yes; Functional Principle: Reduces CPU temperature through heat conduction and fan convection. Note: This part is specific to automatic data processing equipment, recommended classification under 8473.30. Misclassifying general-purpose parts (such as screws, springs) under 8473, should be classified under Chapter 73 or Chapter 85. Failure to distinguish parts specific to ADP (8473.30) from parts of other office machines (8473.50). Ignoring the priority principle of Chapter 85, misclassifying parts with electrical connections under 8473. Incomplete declaration elements, such as missing 'specificity' statement, leading to customs questioning of classification.

The core criteria for classification are: 1) whether the part is suitable for use solely or principally with machines of headings 8469-8472; 2) whether it is a general-purpose part excluded by Chapter 84 notes; 3) whether it is an electrical commodity named in Chapter 85. If the part is specific to computers (ADP), classify under 8473.30 first; if specific to other office machines (such as calculators, typewriters), classify under 8473.10 or 8473.50. 8473.50, as a residual subheading, applies only to other parts not specifically named. Also refer to the 'Explanatory Notes to the Harmonized Commodity Description and Coding System' for the definition of 'parts' to ensure compliance with the 'specificity' standard. 847330 Parts of computers and automatic data processing equipment: 8473.30 is specific to parts of ADP equipment (such as computers, servers), while 8473.50 applies to parts of other office machines or unlisted parts. If the part is clearly used for computers, classify under 8473.30 first. 847350 Parts of other office machines: 8473.50 is a residual subheading, used only when parts are not classified under 8473.10 or 8473.30. If the part can be used for multiple office machines, it may be classified under this subheading. 847310 Parts of typewriters and word-processing machines: 8473.10 is specific to typewriters and word-processing machines, while 8473.50 covers a broader range of other office machine parts. If the part is specific to typewriters, classify under 8473.10. 8504 Transformers, static converters and inductors: If computer accessories are power adapters, transformers, etc., they should be classified under 8504, not 8473, as they are electrical equipment. 8471 Automatic data processing machines and their units: 8471 is for complete machines or complete units (such as CPU, memory), while 8473 is for parts. If the accessory itself constitutes a complete ADP machine, classify under 8471. Is the part suitable for use solely with machines of headings 8469-8472? Is it a general-purpose part excluded by Chapter 84 notes? Is it an electrical commodity named in Chapter 85? Can it be classified under a more specific subheading 8473.10 or 8473.30? Are the declaration elements complete and accurate?

What is the difference between HS code 847350 and 847330? 8473.30 is specific to parts of automatic data processing equipment (such as computers, servers), while 8473.50 is a residual subheading applicable to parts of other office machines (such as calculators, copiers) or computer accessories not specifically named. If the part is clearly used for computers, classify under 8473.30 first; if it cannot be classified under 8473.10 or 8473.30, then use 8473.50. Which code should a computer cooling module be classified under? If a computer cooling module (such as a CPU cooler) is specific to automatic data processing equipment, it should be classified under 8473.30. However, if it is a general-purpose cooling device, it may be classified under 8419 (heat exchange units) or 8473.50. When classifying, confirm specificity and provide proof of use. How to determine whether a part is a general-purpose part or a specific part? Specific parts refer to parts used solely or principally with a particular machine and cannot be used for other machines. General-purpose parts such as screws, springs, washers, etc., even if used in computers, should be classified under Chapter 73 or Chapter 85. Criteria include design, function, sales channels, etc. If necessary, refer to customs advance classification rulings. What is the export tax rebate rate for 847350? The export tax rebate rate is adjusted with national policies. It is recommended to check the latest 'Export Tax Rebate Rate Library' or consult the local tax bureau. Usually, it can be queried by commodity code on the electronic tax bureau or General Administration of Customs website. Note: The rebate rate is related to the HS code but may vary by country and time. What special documents are required when declaring 847350? Generally, basic documents such as contract, invoice, packing list, and bill of lading are required. If a brand is involved, a brand authorization letter is required; if it is a specific part, a use description or technical data may be required. Specific requirements are subject to customs; it is recommended to consult a customs broker in advance. If a part has electronic components, can it still be classified under 8473? If a part has electronic components but its main function is mechanical support or structural, and it complies with Chapter 84 notes, it can be classified under 8473. However, if the electronic components constitute the essential character (such as circuit boards, sensors), it may be classified under Chapter 85. Judgment should be based on the function principle. Is 847350 common in cross-border e-commerce? 8473.50, as a residual subheading, is relatively rare in cross-border e-commerce because most computer parts are classified under 8473.30. However, if selling parts of other office machines (such as calculator housings), this code may be used. Sellers are advised to declare accurately to avoid customs clearance delays due to classification errors. How to query the MFN rate for 847350? You can log on to the website of the General Administration of Customs of China or use the 'Customs Classification Intelligent Navigation' system to query by HS code. You can also consult the paper version of the 'Import and Export Tariff of the People's Republic of China'. Note: Tax rates may vary depending on trade agreements and origin, and different rates may apply; combine with rules of origin.