China HS vs US HTS: why the first 6 digits match but you cannot paste the rest

Your Chinese supplier handed you an "HS code" - or you already have a China 税则 / 海关商品编码 - and someone said the first six digits are the same worldwide. That is mostly right for the international backbone. It is wrong to paste the rest onto a U.S. entry. This guide clarifies China HS vs U.S. HTS digit logic and how to move from a 中文品名 to credible U.S. 10-digit HTS candidates, then verify on live USITC HTS. It is not a full find-HTS tree walk (#1), not a Schedule B deep dive (backlog #8), and not a GRI tutorial.

Disclaimer: Educational. The international Harmonized System (HS) provides a shared six-digit framework; national tariff schedules - including China's 《进出口税则》 and the U.S. Harmonized Tariff Schedule (HTS) - add country-specific digits and descriptions beyond those six digits. A China customs / 税则 code is not a U.S. HTS classification and should not be pasted onto a U.S. entry. U.S. classification and duty liability depend on the correct HTS provision (including the 10-digit statistical reporting number where required), origin, and applicable Chapter 99 treatments on the date of entry. Costvanta accepts Chinese and English product descriptions and helps identify U.S. HTS candidates with related duty-layer context where documented; it does not convert a China code into a binding U.S. classification, does not model Section 232, does not grant product exclusions, does not select or file entry types, and is not a customs broker. Confirm with the current USITC HTS, CBP, and your broker.

One-screen answer (EN + CN callout)

The World Customs Organization (WCO) Harmonized System (HS) is a shared six-digit product nomenclature used by more than 200 countries and economies (WCO - What is the Harmonized System?).

China and the United States each implement that HS6 backbone, then add national digits for their own tariff lines and statistics. Those national extensions are not interchangeable. A China 8- or 10-digit customs / 税则 code is not a U.S. HTS number for import entry.

CN callout: 前6位国际共通；第7位起各国自编；中国编码不能直接填进美国进口报关。

This page = China code vs US HTS clarifier + CN description path

Need the full U.S. tree walk and duty stack? Use #1. This page assumes: I have a China code or Chinese description and I am confused about U.S. HTS.

What "HS" means internationally (6 digits)

WCO: six-digit commodity groups

Per the WCO, the HS is a multipurpose international product nomenclature with more than 5,000 commodity groups, each identified by a six-digit code. More than 200 countries and economies use it for Customs tariffs and trade statistics; over 98% of merchandise in international trade is classified in terms of the HS (WCO overview).

National schedules implement HS6, then extend

Contracting parties implement HS6 in national tariff schedules, then add further digits for national duty lines and statistics. Casual "HS" talk often conflates the international six-digit backbone with a country's longer customs code - two different things.

Prefer "generally harmonized at 6 digits"

Teach commonality of HS6, not a claim that every country's six-digit assignment is identical in every edge case. USITC frames the first six digits as "harmonized" internationally, while remaining digits and descriptions can be unique to a particular country (USITC HTS FAQs).

How China extends beyond HS6

税则号列: 8 digits (HS6 + 本国子目)

China's 《中华人民共和国进出口税则》 uses an 8-digit 税则号列: digits 1-6 align with the Harmonized System; digits 7-8 are 本国子目 for China's needs (税则(2025) 规则与说明 PDF; re-check for a newer edition at publish). CN: 本国子目 start at digit 7 - China's, not the U.S.'s.

Docs often show 10 digits - still not US HTS

Chinese 海关商品编码 and invoices often show 10 digits (8-digit 税号 plus further digits). USITC FAQ illustrates China's blender line as 8509.40.9000. Rule: you may see 8 or 10 digits on a China invoice; neither is a U.S. HTS number (USITC HTS FAQs).

Classification under China's framework (high-level only)

China classifies under the HS Convention framework plus 税则, notes, and classification decisions (海关归类管理规定). No China GRI deep dive here.

How the United States extends beyond HS6 (HTSUS)

4- and 6-digit = international HS; 8- and 10-digit = unique to the US

Per USITC: 4- and 6-digit provisions are part of the international Harmonized System; 8- and 10-digit provisions are unique to the United States. Chapters 98 and 99 do not appear in other countries' schedules (USITC HTS FAQs).

8-digit = legal rate line; 10-digit = statistical reporting for entry

Legal HTS text ends at the 8-digit level, where tariff rates are assigned. A statistical suffix can add two digits for the 10-digit reporting number required on entry. Products under one 8-digit provision share that duty rate (USITC HTS FAQs).

Chapters 98 / 99 and who administers classification

Chapters 98 / 99 are U.S.-specific (including many Chapter 99 trade-remedy headings). USITC publishes the HTS; CBP administers classification at the border (USITC HTS glossary; CBP - Determining Duty Rates). Live search: hts.usitc.gov.

Why you cannot paste a China code into a US entry

Supplier code may be from the country of export

USITC Importing Basics: a foreign supplier's code may be from the country of export. First six digits are "harmonized" internationally; digits after the first six and their descriptions can be unique; each country chooses its own duty rates (USITC HTS FAQs).

Official blender pair (required cite)

USITC example: blenders - U.S. HTS subheading 8509.40.00 / statistical 8509.40.0015 vs China 8509.40.9000. First six (8509.40) identical; last four differ (USITC HTS FAQs).

CN: 不能照抄 the last four.

Sichuan 商务厅 as CN explainer only

Same "前6位相同、后位不同；先确定美国 HTS" message appears in CN provincial explainers - e.g. 四川省商务厅 (2025-05-22). Teaching aid only, not U.S. legal authority. Confirm on hts.usitc.gov.

Optional MOFCOM对照 - still verify USITC

MOFCOM 中外编码对照 (wmsw.mofcom.gov.cn) is convenience mapping only. Still verify on live USITC HTS.

Wrong national digits → wrong General + Chapter 99 path

Wrong national digits can mean the wrong General rate and the wrong Chapter 99 path (e.g. China tech-transfer Section 301). After a credible U.S. 10-digit candidate: #1 for the duty stack; #2 for China-origin additional duty. No invented conversion tables or "change the last four" tricks.

Practical path: Chinese description → US HTS attribute checklist

You do not need a China code first. Start from the product as imported and a clear 中文品名. Short checklist (fuller CN/EN attribute page = #12):

Costvanta accepts Chinese descriptions

Paste the Chinese description into Costvanta. Homepage (verified 2026-10-26 Asia/Shanghai): Chinese and English both work. FAQ confirms CN descriptions with a standardized English reading for verification. Review U.S. HTS candidates, then compare against live legal text.

Confirm on hts.usitc.gov + duty stack via #1

Open candidates on hts.usitc.gov, read notes, then use #1 for the General + Chapter 99 read. This page does not rewrite that tree walk.

Mid-article CTA: Describe the product in Chinese or English on https://www.costvanta.com → review U.S. HTS candidates → confirm on live USITC HTS. Costvanta does not treat a pasted China customs code as a binding U.S. classification.

How this differs from #1, #8, and #12

#1 = how to find U.S. HTS and read General + Chapter 99 → duty stack pillar.

This page = China HS vs U.S. HTS digit logic, "don't paste," and the Chinese-description entry point.

#8 (backlog) = U.S. Schedule B (export) vs U.S. HTS (import) - different confusion; stub only (USITC Schedule B vs HTS FAQ).

#12 = deeper CN/EN attribute checklist → Describe your product for US HTS (CN/EN) - companion, not this article's body.

What Costvanta does and does not do

Per Costvanta import methodology and homepage (fetched 2026-10-26 Asia/Shanghai):

→ Describe the product (CN OK) on https://www.costvanta.com, review candidates, confirm on hts.usitc.gov, broker when material.

Also: #4 landed cost, #13 de minimis, #15 forced-labor 301.

Worked mini-walkthrough

Hypothetical only - no claim that any real SKU "is" a named U.S. HTS. Method as of 2026-10-26; re-check live schedules.

CN seller: China 10-digit on invoice + 中文品名

1. Inputs. Invoice shows a China 10-digit (pattern like FAQ blender 8509.40.9000) plus Chinese commercial name. Do not paste onto a U.S. entry.
2. HS6 as clue only. Extract first six (8509.40) as a clue - not the U.S. answer.
3. Attribute checklist. Capture 材质, 功能与主要用途, 进口时状态, 关键规格. CBP eRuling input guidance is a method aid only (CBP eRuling requirements).
4. Costvanta CN query. Paste Chinese description on https://www.costvanta.com; review standardized English reading and U.S. candidates.
5. Verify USITC. Official blender pair cite: U.S. 8509.40.0015 (subheading 8509.40.00) vs China 8509.40.9000 (USITC HTS FAQs) - cite, not "your SKU is X."
6. Duty stack. #1; if China-origin, #2.
7. Language. "Example method check on DATE" / "candidates for broker review" - never a binding SKU claim from this article.

Callout: CN description without a China code

Skip the China code if you want. A Chinese flask / sheets-style description is enough to start on Costvanta - then still confirm on live USITC HTS.

Contrast stub: Schedule B

U.S. Schedule B (export) ≠ China HS ≠ U.S. import HTS → backlog #8 only.

What to do next

1. Describe the product in Chinese or English on https://www.costvanta.com (CN OK). For the fuller attribute checklist, see #12.
2. Treat any China 8/10-digit as a clue, never paste-ready U.S. HTS.
3. Confirm candidates on hts.usitc.gov.
4. Duty stack via #1; China-origin additional duty via #2.
5. Unit economics: #4. Low-value entry awareness: #13.
6. Licensed broker when value, PGA, AD/CVD, or close-heading ambiguity is material.

CTA: https://www.costvanta.com - Chinese and English both work. U.S. HTS candidates and documented duty-layer context. Not binding China→U.S. conversion; not 232; not exclusion grants; not entry filing.

FAQ

前6位一样，能不能把中国后4位改成美国常见后缀就报关？

No. U.S. 8- and 10-digit provisions are unique to the United States (USITC HTS FAQs). Matching HS6 is not a digit-suffix swap - 不能照抄.

中国税则是8位，发票上是10位，哪个对？

Both can appear. 税则号列 is 8 digits; docs often show 10. Neither is U.S. HTS. Then classify on hts.usitc.gov.

Is my supplier's "HS code" the same as Schedule B?

Usually they mean a China code. U.S. exports use Schedule B; U.S. imports use HTS - backlog #8 (USITC FAQ).

Does Costvanta accept Chinese product descriptions?

Yes. Homepage (verified 2026-10-26): Chinese and English both work, with a standardized English reading → https://www.costvanta.com.

Do I still need to check Section 301 after I have US HTS?

Yes if China-origin → #2. Other layers when relevant: #14, #15, #17.

Does Costvanta convert China HS → US HTS automatically as a binding result?

No. Per methodology: candidates and documented duty-layer context only - not binding China-code conversion, not 232, not exclusions, not entry filing.

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Disclaimer: Educational. The international Harmonized System (HS) provides a shared six-digit framework; national tariff schedules - including China's 《进出口税则》 and the U.S. Harmonized Tariff Schedule (HTS) - add country-specific digits and descriptions beyond those six digits. A China customs / 税则 code is not a U.S. HTS classification and should not be pasted onto a U.S. entry. U.S. classification and duty liability depend on the correct HTS provision (including the 10-digit statistical reporting number where required), origin, and applicable Chapter 99 treatments on the date of entry. Costvanta accepts Chinese and English product descriptions and helps identify U.S. HTS candidates with related duty-layer context where documented; it does not convert a China code into a binding U.S. classification, does not model Section 232, does not grant product exclusions, does not select or file entry types, and is not a customs broker. Confirm with the current USITC HTS, CBP, and your broker.