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Why a Chinese HS code has 6, 8 and 10 digits
Updated 2026-10-18 · ASEAN, China
A buyer once sent us an invoice where the product was "8516.60", the packing list said "85166050" and the certificate of origin carried a third string. All three referred to the same appliance. None of them was accepted by the customs system without a conversation. HS codes are built in layers — international, regional, national — and each layer exists for a different purpose. Knowing which layer each document needs is the difference between a clean entry and a week of amendments.
In short
- 6 digits are the international layer. Every country in the World Customs Organization uses the same first six digits.
- 8 digits are regional. ASEAN uses the AHTN, an 8-digit harmonised tariff nomenclature; the EU uses CN8.
- 10 digits are national declaration codes. China's declaration system and the US HTS both extend beyond 8 — and they are not interchangeable.
- The certificate of origin, the invoice and the customs entry must carry the code the destination requires. Mixing layers is the single most common paperwork failure we see.
The layers, and who uses them
| Layer | Digits | Who uses it | What it decides |
|---|---|---|---|
| HS (World Customs Organization) | 6 | Everyone, as the common base | The international classification of the product |
| AHTN (ASEAN Harmonised Tariff Nomenclature) | 8 | ASEAN member customs | The regional tariff line and duty schedule |
| National tariff / declaration code | 8–10 | Each country's customs system | The exact line declared, and the duty applied |
Two codes can both be "correct" and still be inconsistent. The question is not which one is right in the abstract, it is which one each document requires.
Why this matters beyond duty
- Certification scope. Import approvals are written against a product and often a code. If the entry uses a different line, the certificate may not be accepted as covering the goods.
- Statistics. Our market analysis (and the buyer's) is built on HS codes. If the code shifts, the demand signal you are reading describes a different product group.
- Licences and quotas. Some lines are restricted, licensed or subject to additional controls. The code decides whether those apply.
- Origin claims. A certificate of origin states a code. If it differs from the entry, the preference claim is questioned.
Where it breaks
- Quoting the six-digit code on a commercial invoice because that is what appears in a catalogue.
- Using China's export code in the destination declaration. The destination system does not know China's national line.
- Different codes for the same product in two markets. Legitimate, but the paperwork for each market has to be built on its own code.
- Changing the code between the proforma and the shipment, for example after the factory changes a component.
- Certificates issued against a draft invoice and never reconciled with the final one.
How we keep it consistent
We ask the buyer's broker for the line they intend to declare, before we quote. That single question prevents most of the mismatch cases: the code then flows into the invoice, packing list, certificate of origin and the factory's documents from one source.
- Get the destination line from the broker, not from a Chinese catalogue.
- Carry one code per document set, and reconcile the final invoice against the certificate before it is issued.
- Keep the product description specific (function, material, capacity) so the classification can be defended if it is questioned.
- If the buyer changes the code, re-check the certification scope — the approval may not follow the new line automatically.
Categories this applies to
Electric oven · Stand fan · Induction cooker · Air fryer & multi-cooker
Buyer questions
Which HS code should go on the commercial invoice?
The one the destination customs system will accept for that product — normally the importer's national tariff line. The six-digit international code alone is usually not enough for a declaration.
Our supplier gave us an 8-digit code. Can we use it?
Use it as a starting point, not as the declaration code. Chinese export codes and destination tariff lines are different national extensions of the same six digits. Confirm with the importer's broker.
Is it illegal to use a different code in two markets?
No. Each country has its own national tariff line. The requirement is that the code used in each shipment's documents is consistent within that shipment and defensible for the product.
What if the broker disagrees with our code?
The broker's classification is the one that will be declared, so settle it before the documents are issued. If the new line changes the certification scope or the origin treatment, deal with that before shipment rather than after arrival.
Does the HS code affect which certification we need?
Often yes, because mandatory product lists are written around product categories and tariff lines. A code change can move the product into or out of a certification requirement — which is why it belongs in the quotation stage, not the shipping stage.
Primary sources
Checked 2026-10-18. Rules change; verify with the authority before you ship.
- World Customs Organization — Harmonized System
- ASEAN — AHTN (ASEAN Harmonised Tariff Nomenclature)
- General Administration of Customs of China
Ask about your product
Not sure whether this applies to what you are buying? Send the specification and we will tell you what has to be in whose name — request a quote, or email sales@xinhuichuan.com.