Chapter 70 covers glass and glassware, including flat glass, glass fibers, glassware, glass instruments, etc. This chapter is arranged from raw materials to finished products according to the degree of processing. 7003 to 7005 are flat glass, of which 7005 specifically refers to float glass and surface ground or polished flat glass. Float glass is the most important flat glass production process today, and this chapter further subdivides it by thickness, whether it is wired, whether it is colored, etc. Heading 7005 includes float glass and surface ground or polished flat glass, whether or not wired, colored, opaque, coated or with an absorbent/reflective layer, but not otherwise worked. Specifically covers: float glass in sheets (not ground or polished), surface ground or polished flat glass, and wired glass. It does not include glass that has been further worked (e.g., bent, drilled, coated with a non-metallic layer, etc.), nor safety glass (7007) or laminated glass (7007). Code 700529 has 6 digits: the first 2 digits '70' represent Chapter 70 (glass and glassware); the 3rd-4th digits '05' represent heading 7005 (float glass and surface ground or polished flat glass); the 5th-6th digits '29' represent subheading 700529 (other float glass sheets). Under 7005, it is first divided by whether it is wired into 700510 (wired glass) and 7005.2 (other non-wired glass); 7005.2 is further divided by whether it is colored, opaque, coated, etc. into 700521 (colored or opaque, etc.) and 700529 (other). Therefore, 700529 specifically refers to ordinary transparent float glass that is not wired, not colored, not coated, not ground or polished, but note that its thickness may affect classification. The product is float glass sheets, not wired, not colored, not coated, not ground or polished, and not otherwise worked, so it is classified under 700529. If it were wired glass, it would be classified under 700510; if it were colored, opaque or coated glass, it would be classified under 700521; if the surface were ground or polished, it would be classified under the corresponding subheading under 7005.2, but grinding or polishing does not affect classification under 7005, only the subheading. If the glass has been bent, drilled, etc., it is classified under 7006; if it is safety glass, it is classified under 7007.

Product Name: The specific name of the declared commodity, such as 'float glass sheet', 'transparent float glass'. It should accurately reflect the product attributes and avoid writing 'glass' in general terms. Brand: Manufacturer or brand name. If there is no brand, fill in 'no brand'. The brand helps customs confirm the source of the goods and the status of intellectual property rights. Specifications and Dimensions: Includes thickness (e.g., 2mm, 3mm, etc.), length, width. The thickness of float glass is an important classification parameter and affects subheading division. Whether Wired: Declare whether it contains a metal wire mesh. Wired glass is classified under 700510, non-wired under 700529. Must clearly answer 'yes' or 'no'. Whether Colored: Declare whether the glass is colored throughout (e.g., body-tinted). Colored glass is classified under 700521, uncolored under 700529. Need to distinguish body tinting from surface coating. Whether Coated: Declare whether the surface has a metallic or non-metallic coating (e.g., Low-E film). If coated, classified under 700521 or other under 7005.2; if not coated, under 700529. Processing Technique: Explain whether it has been ground, polished, bent, drilled, etc. Only grinding and polishing still fall under 7005; other processing falls under 7006. Use: Briefly explain the use, such as construction, automotive, furniture, etc. Use helps customs determine classification, but is not decisive. Customs declaration example: Product Name: Float glass sheet Brand: No brand Specifications: Thickness 3mm, length 2440mm, width 1830mm Whether wired: No Whether colored: No Whether coated: No Processing technique: Not ground or polished, not bent Use: For building doors and windows HS Code: 7005290090 Declaration elements: 1. Product Name: Float glass sheet; 2. Brand: No brand; 3. Specifications: 3mm×2440mm×1830mm; 4. Whether wired: No; 5. Whether colored: No; 6. Whether coated: No; 7. Processing technique: Not ground or polished; 8. Use: Building doors and windows. Mistakenly classifying wired glass under 700529, when it should be under 700510. Ignoring coloring or coating of glass, leading to incorrect subheading. Classifying glass that has been bent, drilled, etc. under 700529, when it should be under 7006.

Core basis for classification: First confirm whether the product is float glass or surface ground/polished flat glass, and not otherwise worked. Then check whether it is wired: wired goes to 700510, non-wired to 7005.2. Then check whether it is colored, opaque, coated, or has an absorbent/reflective layer: if yes, to 700521; otherwise to 700529. Thickness does not affect subheading division, but may affect other headings (e.g., 7003, 7004). If the glass has been bent, drilled, coated with a non-metallic layer, etc., it is classified under 7006; if it is safety glass, under 7007. 700510 Wired glass: 700510 is wired glass, with a metal wire mesh inside; 700529 is non-wired glass. The core difference is whether it contains metal wires. 700521 Colored or coated non-wired float glass: 700521 is non-wired glass that is body-tinted, opaque, coated, or has an absorbent/reflective layer; 700529 is transparent non-wired glass that is not colored or coated. 700600 Worked glass: 700600 includes glass that has been bent, drilled, coated with a non-metallic layer, etc.; 700529 is limited to flat glass not subjected to such processing. 700711 Tempered safety glass: 700711 is tempered safety glass, used for vehicles, etc.; 700529 is ordinary float glass, not tempered. 700319 Other non-wired glass sheets: 700319 is rolled or blown glass, not float process; 700529 is float process. Has it been confirmed that the glass is made by the float process? Has it been checked whether the glass is wired? Has it been confirmed that the glass is not colored or coated? Has it been confirmed that the glass is not bent, drilled, etc.? Have the thickness, dimensions, and other specifications been verified?

How to query the HS code for float glass? First confirm that the glass is made by the float process, then check whether it is wired, colored, coated, or processed. If none, classify under 700529. You can refer to the 'Import and Export Tariff' or customs classification pre-rulings. What is the difference between 700529 and 700521? 700521 is non-wired float glass that is colored, opaque, coated, or has an absorbent/reflective layer; 700529 is transparent non-wired float glass that is not colored or coated. The key difference is whether it is colored or coated. Float glass with a coating should be classified under which code? If the coating is a metallic or non-metallic layer and no other processing has been done, it is usually classified under 700521. However, the type of coating must be confirmed; if it is a Low-E film, etc., it still goes to 700521. Wired glass is classified under which code? Wired glass is classified under 700510, regardless of whether it is colored or coated. Wired glass has a metal wire mesh inside, different from ordinary float glass. How is ground and polished float glass classified? Grinding and polishing do not affect classification under 7005, but it should be classified under the corresponding subheading based on whether it is wired, colored, etc. If not wired and not colored, it goes to 700529. Does the thickness of float glass affect the HS code? Under 7005, thickness does not affect subheading division. However, if the thickness is extremely thin or thick, it may be classified under other headings, such as 7003 or 7004. Judgment should be made based on specific specifications. What elements need attention when declaring 700529? Need to declare product name, brand, specifications and dimensions, whether wired, whether colored, whether coated, processing technique, use, etc. Ensure information is accurate to avoid classification errors. If float glass is used for automobiles, is it classified under 700529? If it is ordinary float glass, not tempered or laminated, it is still classified under 700529. But if it is tempered or laminated safety glass for automobiles, it is classified under 7007.