Chapter 90 covers optical, photographic, cinematographic, measuring, checking, medical or surgical instruments and apparatus, precision instruments and apparatus; parts and accessories thereof. Goods of this chapter are characterized by high technology content and precision, and are widely used in industry, medical care, scientific research and other fields. The classification within the chapter follows the logic from complete machines to parts. 9028 is a specific tariff heading for metering instruments, and the classification of their parts must be determined in conjunction with the function of the complete machine. Heading 9028 includes metering instruments for the production or supply of gas, liquid and electricity, including their calibration instruments. Specifically, it covers: gas meters, liquid meters, electricity meters (such as kilowatt-hour meters) and their calibration instruments. These instruments are used for continuous measurement and recording of the volume, mass or electrical energy consumption of fluids, and are key equipment for trade settlement and energy management. Code 902890 is a 6-digit subheading. The first 2 digits '90' represent Chapter 90 (optical, measuring, medical and other precision instruments). Digits 3-4 '28' represent heading 9028 (metering instruments for the production or supply of gas, liquid and electricity and their calibration instruments). Digits 5-6 '90' represent subheading 9028.90, i.e., parts and accessories of the above metering instruments. Therefore, 902890 specifically refers to parts for gas, liquid and electricity metering instruments, such as counters, gear sets, housings, circuit boards, etc. This commodity is a part of a vehicle-mounted meter. Vehicle-mounted meters are usually used to measure the consumption of liquid or gas such as vehicle fuel, urea, natural gas, etc., and belong to liquid or gas metering instruments. Therefore, their parts should be classified under 9028.90, rather than parts of 9029 (revolution counters, production counters) or 9032 (automatic regulating instruments). The key distinction lies in whether the function of the complete machine is a metering instrument.

Product Name: The specific name of the declared commodity should accurately reflect the use of the part, such as 'counter for vehicle-mounted gas meter'. Avoid vague expressions such as 'accessory'. Use: Explain which metering instrument the part is dedicated to, such as 'for vehicle-mounted CNG meter', 'for fuel flow meter'. It must correspond to the function of the complete machine. Material: Declare the main material of the part, such as plastic, metal, electronic components, etc. Material affects classification judgment but is not a decisive factor. Brand: Fill in the brand of the part or the complete machine. If there is no brand, fill in 'no brand'. The brand helps customs verify the authenticity of the declaration. Model: Fill in the model of the part or the complete machine so that it can be matched with the complete machine. The model should be specific, avoiding vague expressions such as 'universal type'. Part Number: The unique part number assigned by the manufacturer for identification and traceability. If there is no number, fill in 'none'. Whether Dedicated Part: Declare whether the part is dedicated to metering instruments under 9028 or is a general-purpose part. Dedicated parts are classified under 9028.90, and general-purpose parts are classified according to material. Customs declaration example: Product name: counter for vehicle-mounted gas meter; Use: for vehicle-mounted CNG meter, recording gas flow; Material: plastic housing + electronic components; Brand: XYZ; Model: CNT-2024; Part number: P-12345; Whether dedicated part: yes. This counter is dedicated to a vehicle-mounted gas meter and uses pulse signals for counting, classified under 9028.90. Declaring general-purpose parts (such as standard fasteners) as dedicated parts, leading to classification errors. The use description is inconsistent with the function of the complete machine, such as declaring electricity meter parts as water meter parts. Failure to declare 'whether dedicated part', making it impossible for customs to determine classification. False declaration of brand and model, affecting subsequent audit and traceability.

The core basis for classification is General Rules 1 and 6 for the interpretation of the HS, as well as the chapter notes and heading texts of Chapter 90. 9028.90 is a subheading for 'parts and accessories' and applies only to parts dedicated to or mainly used with metering instruments under 9028. When judging, it is necessary to confirm: 1) whether the complete machine is a gas, liquid or electricity metering instrument; 2) whether the part is dedicated to that complete machine; 3) whether the part constitutes an essential character of the complete machine. General-purpose parts (such as standard screws), even if used in meters, should be classified according to material. 90289010 Parts of electricity meters: Parts of electricity meters specifically refer to parts of electricity metering instruments (such as kilowatt-hour meters), while 90289090 covers parts of other metering instruments. If the part is dedicated to an electricity meter, it should be classified under 90289010; if it is used for a gas or liquid meter, it is classified under 90289090. 90299000 Parts of revolution counters and production counters: 9029 covers revolution counters, production counters, odometers, etc., and their parts are classified under 9029.90. If a vehicle-mounted meter only counts mileage, it may be classified under 9029; but if it measures gas/liquid flow, it is classified under 9028. The key difference is whether the object of measurement is gas/liquid volume. 90329000 Parts of automatic regulating instruments: 9032 covers automatic regulating or controlling instruments, and their parts are classified under 9032.90. If a vehicle-mounted meter has an automatic regulating function (such as closed-loop control), the complete machine may be classified under 9032, and the parts accordingly under 9032.90. But if it is purely metering without regulating function, it is classified under 9028. 84819010 Parts of valves: 8481 covers valves, and their parts are classified under 8481.90. If the meter part is the valve itself (such as a flow control valve), it should be classified under 8481 rather than 9028. Judgment should be based on the function of the part. 90269000 Parts of other measuring instruments: 9026 covers instruments for measuring the flow or level of liquids or gases, etc., and their parts are classified under 9026.90. The difference between 9026 and 9028 is: 9026 is used for measuring parameters such as flow and liquid level (not for trade settlement), while 9028 is used for production or supply metering (trade settlement). If a vehicle-mounted meter is used for trade settlement, it is classified under 9028; if it is only used for monitoring, it is classified under 9026. Is the complete machine a gas/liquid/electricity metering instrument? Is the part dedicated to that complete machine? Does the part constitute an essential character of the complete machine? Is it a general-purpose part (such as a standard screw)? Is there any conflict with other headings (such as 8481, 9032)?

How to determine whether a vehicle-mounted meter part should be classified under 9028.90 or 9029.90? The key is the function of the complete machine: if the complete machine is used to measure gas or liquid volume (such as a fuel flow meter), it is classified under 9028, and the part under 9028.90; if the complete machine is only used to count revolutions or mileage (such as an odometer), it is classified under 9029, and the part under 9029.90. Reference can be made to the complete machine manual and function description. Can general-purpose parts (such as screws) used in vehicle-mounted meters be classified under 9028.90? No. According to the General Rules for classification, general-purpose parts, even if dedicated to a certain machine, should be classified according to their material (for example, steel screws under 7318). Only parts dedicated to or mainly used with instruments under 9028 are classified under 9028.90. Are there further subdivisions under subheading 9028.90? How to check the specific tax rate? In China's tariff schedule, 9028.90 may be subdivided into 90289010 (parts of electricity meters) and 90289090 (other). To check the tax rate, use the latest edition of the 'Import and Export Tariff of the People's Republic of China' or the website of the General Administration of Customs, and enter the code for query. Tax rates may change, and the official release shall prevail. How to fill in the use column when declaring parts of vehicle-mounted CNG meters? The use should be specific, such as 'for vehicle-mounted CNG meter, measuring compressed natural gas flow'. Avoid vague 'for automobiles'. At the same time, declare elements such as material, brand, and model to ensure matching with the complete machine. If a vehicle-mounted meter part can also be used in other equipment, how should it be classified? If the part is a general-purpose item, classify according to material; if it is a dedicated item but can also be used in other equipment, it is necessary to determine the main use. According to General Rule 3 (c), classify according to the main use. It is recommended to provide instructions for use and proportion evidence. What is the difference between 9028.90 and 9026.90? 9026 is used for measuring parameters such as flow and liquid level (not for trade settlement), while 9028 is used for production or supply metering (trade settlement). If a vehicle-mounted meter is used for trade settlement (such as metering at a filling station), it is classified under 9028; if it is only used for vehicle monitoring, it is classified under 9026. What are the consequences of failing to declare 'whether dedicated part' during customs declaration? It may make it impossible for customs to determine classification, leading to inspection, supplementary tax payment or administrative penalties. It is recommended to declare completely and provide proof of part dedication (such as complete machine manual, part drawings). How to check the regulatory conditions for 9028.90? Regulatory conditions need to be checked in the latest 'Customs Import and Export Tariff' or the 'Single Window' system. Common regulatory conditions include A (Entry Goods Clearance Form), O (Automatic Import License), etc. The specific conditions shall be subject to official release.