Chapter 85 covers electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles. This chapter is one of the most technology-intensive chapters in the HS classification, covering a wide range of goods from household appliances to industrial electronic equipment. Cathode-ray tubes and their parts, as core components of electronic display technology, are typical goods of this chapter. Heading 8540 specifically covers thermionic, cold cathode or photocathode tubes (including gas-filled tubes, cathode-ray tubes, television camera tubes, etc.); and diodes, transistors and similar semiconductor devices; light-emitting diodes; piezoelectric crystals, etc. Among these, 8540.90 covers parts not specified or included elsewhere, including parts of cathode-ray tubes, such as electron guns, deflection coils, shadow masks, etc. Code 854090 is a 6-digit subheading. The first 2 digits, 85, indicate Chapter 85 (electrical machinery and equipment and parts thereof). The 3rd-4th digits, 40, indicate heading 8540 (thermionic, cold cathode or photocathode tubes). The 5th-6th digits, 90, indicate subheading 8540.90, i.e., parts not specified or included elsewhere. Note: under 8540 there are also subheadings 8540.11 to 8540.89, corresponding to different types of tubes (such as color cathode-ray tubes, monochrome cathode-ray tubes, television camera tubes, etc.), while 8540.90 is specifically for parts of these tubes. Parts of cathode-ray tubes (such as electron guns, deflection coils, shadow masks, etc.) are components dedicated to cathode-ray tubes, rather than complete tubes. According to the General Rules for the Interpretation of the HS, if a part is dedicated to a certain class of goods, it should be classified under the parts heading of that goods. Therefore, these parts are classified under 8540.90, rather than under complete-tube headings such as 8540.11 (color cathode-ray tubes), and not under 8548 (electrical parts of this chapter not specified or included elsewhere).

Product name: The specific name of the declared goods, such as "electron gun for cathode-ray tubes", "deflection coil", etc., which must be consistent with the actual item. Use: State that the part is dedicated to cathode-ray tubes, such as "for color picture tubes", "for oscilloscope cathode-ray tubes", etc. Brand: Fill in the manufacturer's brand or trademark; if there is no brand, fill in "no brand". Model: Fill in the model or specification of the part, such as "EG-1234". Material: Main material, such as metal, ceramics, glass, etc., which affects classification. Whether dedicated for cathode-ray tubes: Confirm whether the part is dedicated to cathode-ray tubes or is a general-purpose part. Working principle: Briefly explain the function of the part in a cathode-ray tube, such as "emits electron beam", "deflects electron beam", etc. Product name: electron gun for cathode-ray tubes; Use: dedicated for color picture tubes, emits electron beam; Brand: no brand; Model: EG-2024; Material: metal (Kovar alloy) and ceramics; Whether dedicated for cathode-ray tubes: yes; Working principle: electrons are emitted through a hot cathode, focused and accelerated by the grid to form an electron beam. Confusing cathode-ray tube parts with integrated circuit parts, incorrectly classifying under 8542. Ignoring the "dedicated nature" determination and classifying general-purpose electronic parts under 8540.90. Incomplete declaration elements, such as missing use, brand, model, etc., resulting in rejection.

The core basis for classification is General Rules 1 and 6 for the Interpretation of the HS and the notes to Chapter 85. First determine whether the goods are dedicated parts of cathode-ray tubes. If they are dedicated parts and are not named in other subheadings of 8540, classify under 8540.90. If they are general-purpose parts, they may be classified under 8548. At the same time, refer to the Explanatory Notes to 8540 in the Import and Export Tariff for the scope of parts. 854011 Color cathode-ray tubes: 854011 is a complete color cathode-ray tube, while 854090 is its dedicated parts. The difference between a complete tube and parts lies in whether it has complete functions. 854020 Television camera tubes: 854020 is a television camera tube, which is a photosensitive tube, while 854090 is parts of cathode-ray tubes, with different uses. 854800 Electrical parts of this chapter not specified or included elsewhere: 854800 is general-purpose electrical parts, while 854090 is parts dedicated to cathode-ray tubes, and dedication takes priority. 853400 Printed circuits: 853400 is printed circuit boards. If the cathode-ray tube part is a printed circuit board, it may be classified under 853400, but if it is a dedicated assembly, it is classified under 854090. Are the parts dedicated to cathode-ray tubes? Are the parts already named in other subheadings of 8540? Are the parts general-purpose electrical parts? Have sufficient declaration elements been provided? Have the latest version of the Tariff and its notes been consulted?

What is the difference between the HS codes for cathode-ray tube parts and complete cathode-ray tubes? Complete cathode-ray tubes are classified under subheadings 8540.11 to 8540.89 according to type, while parts are classified under 8540.90. Complete tubes have complete functions, while parts are dedicated to complete tubes, and the determination should be based on the state of the goods. How can one determine whether a part is dedicated to cathode-ray tubes? Mainly look at whether its design and structure are only suitable for cathode-ray tubes, such as electron guns, shadow masks, etc. If it can be used for other equipment, it may be a general-purpose part and should be classified under other codes. What are the most common errors when declaring cathode-ray tube parts? Common errors include: product names declared too generally, inaccurate use descriptions, omitted brand and model, and misreporting general-purpose parts as dedicated parts. It is recommended to fill in the declaration elements in detail. If cathode-ray tube parts are imported, what additional documents are required? Generally, basic documents such as contracts, invoices, packing lists, and bills of lading are required. If mechanical and electrical products are involved, CCC certification or energy efficiency labels may be required, depending on customs requirements. Are cathode-ray tube parts subject to export control? Cathode-ray tube technology has been gradually phased out, but some high-precision parts may be subject to export control. It is recommended to consult the Export Control Law of the People's Republic of China and related lists, or consult a professional customs broker. How can one check the tariff rate for cathode-ray tube parts? You can log on to the website of the General Administration of Customs of China or use the Import and Export Tariff, enter HS code 854090 to view the MFN rate, general rate, etc. Rates may change, and the latest published version shall prevail. Can cathode-ray tube parts be classified under 8548? No, because 8540.90 specifically names cathode-ray tube parts. According to the General Rules for Interpretation, they should be classified under 8540.90 in priority, rather than under 8548. If cathode-ray tube parts are complete sets of unassembled components, how should they be classified? If the complete sets of unassembled components already have the essential character of a complete tube, they may be classified as a complete tube; if not, they should be classified separately. The determination should be made according to the specific situation, and it is recommended to consult customs.