Chapter 90 covers optical, photographic, cinematographic, measuring, checking, medical or surgical instruments and apparatus; precision instruments and apparatus; parts and accessories thereof. This chapter has a broad scope, ranging from eyeglasses and microscopes to medical equipment and industrial measuring instruments. The core characteristic is that these goods are typically highly precise and technologically complex, used for professional or scientific purposes, rather than the simple functions of ordinary consumer goods. Heading 9011 specifically covers optical microscopes, including stereoscopic microscopes, compound optical microscopes, etc., whether or not fitted with means for photographing, projecting, or microphotography. This heading also includes parts and accessories of microscopes, but they must be clearly parts for optical microscopes, not parts for other instruments (such as electron microscopes). Code 901190 is a 6-digit subheading. The first 2 digits '90' represent Chapter 90 (optical, medical, etc. instruments). The 3rd-4th digits '11' represent heading 9011 (optical microscopes). The 5th-6th digits '90' represent subheading 9011.90, i.e., parts and accessories of optical microscopes. Note: 9011.10 is for stereoscopic microscopes, 9011.20 is for other compound optical microscopes, 9011.80 is for other microscopes, and 9011.90 specifically refers to parts and accessories. Therefore, 901190 specifically refers to accessories for vehicle-mounted microscopes, provided that these accessories are for optical microscopes and are not more specifically listed in other subheadings. Vehicle-mounted microscope accessories are classified under 901190 because they are dedicated parts or accessories of optical microscopes. If the accessory itself is a complete microscope, it should be classified under 9011.10, 9011.20, or 9011.80; if it is a part of an electron microscope, it should be classified under 9012.90. In addition, if the accessory is a general-purpose part (such as screws, brackets), it may be classified according to its material, but dedicated accessories are preferentially classified under 901190.

Product Name: The standard name of the declared commodity, which should be specific and clear, such as 'bracket for vehicle-mounted microscope', 'objective lens for vehicle-mounted microscope', etc. Use: Explain what kind of microscope the accessory is used for, such as 'used for vehicle-mounted optical microscope, installed on a vehicle for observation', etc. Material: Main material, such as metal, plastic, glass, etc., which affects classification and document review. Brand: Manufacturer or brand name; if there is no brand, indicate 'unbranded'. Model: The product's model or specifications for easy identification. Whether Dedicated Part: Declare whether the accessory is dedicated to optical microscopes or is a general-purpose part. Working Principle: Briefly explain the accessory's function in the microscope, such as 'used to adjust focus', 'used to fix the lens barrel', etc. Product Name: Metal bracket for vehicle-mounted microscope; Use: Used for vehicle-mounted optical microscope, fixing the microscope body to the vehicle dashboard; Material: Aluminum alloy; Brand: Unbranded; Model: VMS-001; Whether Dedicated Part: Yes, dedicated to optical microscopes; Working Principle: Supports and adjusts the microscope angle through a mechanical structure. Mistakenly declaring electron microscope accessories as optical microscope accessories, resulting in incorrect coding. Failing to indicate 'vehicle-mounted' use, which may result in classification under other microscope accessory subheadings. Declaring general-purpose parts (such as standard screws) as dedicated parts; they should be classified according to material.

The core basis for classification is the notes to Chapter 90 of the Import and Export Tariff and the text of heading 9011. Heading 9011 includes optical microscopes and their parts and accessories. Parts and accessories must be dedicated to or mainly used for optical microscopes. If an accessory can be used for other equipment (such as cameras), it cannot be classified under 9011.90. In addition, reference should be made to the National Subheading Notes and customs classification decisions to confirm that 'vehicle-mounted' does not change its essential nature as an optical microscope accessory. 901110 Stereoscopic microscopes: 901110 is a complete stereoscopic microscope, while 901190 is its parts and accessories. If a complete machine is declared, it should be classified under 901110. 901120 Other compound optical microscopes: 901120 is a complete compound optical microscope, including biological microscopes, etc. If accessories are used for such microscopes, they are still classified under 901190, but complete machines are classified under 901120. 901290 Parts of electron microscopes: 901290 is parts of electron microscopes, while 901190 is parts of optical microscopes. The two have different principles and must not be confused. 900590 Parts of other optical instruments: 900590 covers parts of heading 9005, such as parts of binoculars. If an accessory is not dedicated to microscopes, it may be classified here. 903190 Parts of other measuring instruments: 903190 is parts of heading 9031, such as measuring or checking instruments. If a vehicle-mounted microscope is used for measurement, the main function must be distinguished. Is the accessory dedicated to optical microscopes? Does it belong to a complete microscope or an electron microscope accessory? Can it be classified under another more specific heading? Are the declaration elements complete and accurate? Have the latest classification decisions been referenced?

Is there a difference in HS codes between vehicle-mounted microscope accessories and ordinary microscope accessories? There is no difference. HS code classification depends on the function, use, and dedicated nature of the accessory, not the usage scenario. As long as the accessory is dedicated to optical microscopes, whether vehicle-mounted or not, it should be classified under 901190. However, the 'vehicle-mounted' use must be indicated during declaration so that customs can confirm. How can one determine whether an accessory is dedicated to optical microscopes? Mainly look at whether its design and structure can only be used for optical microscopes, or whether it plays a key role in the microscope. For example, objective lenses, eyepieces, and lens barrels are dedicated to microscopes; general screws and brackets may be used for multiple devices and must be classified according to material. Reference can be made to customs classification decisions or advance classification rulings. If a vehicle-mounted microscope accessory is a plastic product, is it still classified under 901190? Yes. As long as the plastic accessory is dedicated to optical microscopes, it is still classified under 901190, because HS classification prioritizes dedicated nature over material. However, if the plastic accessory is a general-purpose item, it may be classified under Chapter 39 as a plastic product. What declaration elements are required for importing vehicle-mounted microscope accessories? Product name, use, material, brand, model, whether it is a dedicated part, working principle, etc. are required. The specific requirements are subject to customs. It is recommended to consult the 'Specified Declaration Catalogue for Import and Export Commodities of the Customs of the People's Republic of China' and the latest announcements in advance. What is the export tax rebate rate for 901190? The export tax rebate rate adjusts with national policies and is not fixed. It is recommended to check the latest export tax rebate rate database of the State Taxation Administration, or consult the local tax authority. The actual policy shall prevail at the time of customs declaration. If a vehicle-mounted microscope accessory contains electronic components, will it affect classification? If the electronic components only assist the optical microscope in working (such as LED lighting), it is still classified under 901190. However, if the main function of the accessory is electronic imaging or processing, it may be classified under other headings (such as 8525, etc.). Judgment must be based on the main function. How can one query the latest annual import tariff rate for 901190? You can log in to the official website of the General Administration of Customs of China or the 'Internet + Customs' platform to query the 'Import and Export Tariff' and the latest tariff adjustment. You can also use a customs commodity code query tool and enter 901190 to obtain the real-time tariff rate. Note that tariff rates may vary due to trade agreements. What are the consequences of an incorrect code during customs declaration? An incorrect code may lead to customs document review failure, return of documents, supplementary tax payment, fines, and even affect the enterprise's credit rating. If taxes are underpaid due to classification errors, they must be paid retroactively and late fees may be added. It is recommended to use advance classification rulings or consult a professional customs broker.