When conducting customs commodity classification, it is crucial to accurately understand and fill in the purpose, function, and principle of the commodity. These elements seem similar, but there are obvious differences between them. Misunderstanding may lead to classification errors, thus affecting the smooth progress of the business. Today, we will talk about these concepts in an easy - to - understand way to help you better understand their declaration requirements.?Import/export?I. Purpose

PurposeIn the declaration elements, there are often some prompts for limiting the scope, and special attention should be paid to the content in parentheses. For example:It can be filled as for laboratory use, chemical use, agricultural use, etc..It can be filled as for industrial use, non - industrial use.

1. 6909 It can be filled as used for connection between pipes.
2. 7326 It can be filled as for metal processing, for wood processing, etc..
3. 7307 It can be filled as for motor vehicles, for furniture, etc..
4. 8208 It must be filled as for electronic products such as microprocessors, telecommunications equipment, automatic data processing equipment or devices.
5. 8301 In addition, for some commodity codes, it is necessary to specify the specific occasion of application and its function in detail, especially for the declaration of machine parts. For example:
6. 8414599050 Must fill in for electronic products such as microprocessors, telecommunications equipment, automatic data processing equipment or devices.

In addition, for some commodity codes, it is necessary to provide a detailed description of the specific occasions of use and their functions, especially for the declaration of machine parts. For example:84733090, 8466100000, 85030090For these codes, the applicable models need to be declared, that is, they are applicable to a certain model of a certain brand or are commonly used for some equipment, as well as their specific functions.

FunctionIt refers to the role that a commodity can play or the attributes it possesses. It can be simply understood aswhat this commodity can do. The function usually describes the specific use of the commodity or the goal it achieves. For example:

• 90261000 The function can be declared as plays the role of detecting the liquid flow rate.

PrincipleIt describes the basic working mechanism that a commodity is based on during operation. Simply put, it iswhy it plays such a role. Machines with the same function may have different principles, and under different tariff items, the description of the principle will also vary. For example:

1. 8413 The principle can be declared as reciprocating, rotary, centrifugal.
2. 8514, 8516 The heating principle describes the way of generating heat and can be declared as resistance heating, induction heating, resistance loss heating, etc.
3. 8528 The display principle describes the specific way of the display device and can be declared as cathode ray tube, liquid crystal, plasma, etc.

When making commodity declarations, the customs also has different requirements for use, function, and principle:

• Use (Where): If only use needs to be declared, then two elements, theapplicable occasionandand specific functionof the commodity need to be filled in.
• Function (What): The function describes the role that the commodity plays, that is, what this commodity can do.
• Principle (Why): The principle is filled in according to the prompts in the declaration elements, describing the specific working principle of the commodity, that is, why this commodity can play such a role.

When classifying commodities, it is crucial to clarify the differences between use, function, and principle. Use describes where the commodity is used, function is what it can do, and principle is why it can do it. Accurately understanding these elements not only helps improve the accuracy of classification but also avoids troubles and unnecessary costs caused by incorrect declarations.