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# 标题 URL/文件路径 Tier 支撑的关键事实
1 今晚 · 子主题 1:HTS 6304.93.00 关税裁定 batches/2026-09-21/raw/subtopic_1_research.md Tier 1(内部报告,含官方源) 三说裁定;6304939000 vs 6304.93.00;List 4B 已中止;12.5% 适用性;豁免清单穷举;敏感性 9.3/21.8/24.3%
2 USITC HTS 当前版本 API(2026HTSRev19) https://hts.usitc.gov/reststop/currentRelease Tier 1 全部税率的版本基准
3 USITC HTS Chapter 63 官方 PDF https://hts.usitc.gov/reststop/file?release=currentRelease&filename=Chapter%2063 Tier 1 6304.93.00 Column 1 General = 9.3%;Column 2 = 90%
4 USITC HTS Chapter 99 官方 PDF(818 页) https://hts.usitc.gov/reststop/file?release=currentRelease&filename=Chapter%2099 Tier 1 9903.05.31 中国 +12.5%;U.S. Note 52 全文;9903.88.15=7.5% / 9903.88.16 已中止;6304.93.00 全 4 处出现位置及归属
5 CBP 裁决 NY N324833(CROSS 镜像) https://www.customsmobile.com/rulings/docview?doc_id=NY+N324833 Tier 1(官方裁决) 6304.93.0000 = 9.3%;属 9903.88.16(List 4B 15%),2019-12-15 起中止
6 今晚 · Hermes 补验:FR 2026-15181 Annex I 中国档位裁定 batches/2026-09-21/raw/hermes_supplement_annex1.md Tier 1(官方镜像全文) 中国 = additive 12.5%(无 net-of-MFN);net-of-MFN 名单仅 5 经济体;总税 21.8% 收口
7 Federal Register 2026-15181 全文(GPO 官方镜像) https://www.govinfo.gov/content/pkg/FR-2026-07-28/html/2026-15181.htm Tier 1 中国条目原文;60 经济体总表;10%/12.5% 两档分档逻辑
8 Federal Register API — doc. 2026-15181 元数据 https://www.federalregister.gov/api/v1/documents/2026-15181.json Tier 1 终裁发布日 2026-07-28、Annex I/II 结构
9 USTR — China Section 301 Tariff Actions https://ustr.gov/issue-areas/enforcement/section-301-investigations/tariff-actions Tier 1 List 1/2/3/4 官方框架与排除程序
10 Crane Worldwide — New Section 301 Forced Labor Tariffs https://www.craneww.com/insights/new-section-301-forced-labor-tariffs-take-effect-as-section-122-duties-expire Tier 2 2026-07-23 宣布 / 07-24 生效;Section 122 到期 → 净 −2.5pp;在途豁免(单源 ⚠️)
11 TariffsAPI — HTS 6304.93.00.00 https://tariffsapi.com/hts/6304.93.00.00 Tier 3 基础 9.3%;Effective (China) 21.8%,拆分 301 = 12.5%(与官方独立吻合)
12 TariffsChart — HTS 6304.93.00.00 https://tariffschart.com/hs/6304-93-00-00 Tier 3 仅确认基础 9.3%;明确拒绝硬编码 7.5%/25%(方法论佐证)