Third-party Material and Citations

Last reviewed: 2026-09-01.

This register distinguishes repository-owned material from third-party sources. A link is not a transfer of rights. Contributors must add or update an entry when adding external media, a substantial quotation, a dataset, or a product capability claim.

Material or claim Location Source / rights holder Status and use Accessed
CEFR global scale CEFR chapters; no local chart bundled Council of Europe Official descriptors paraphrased with attribution; the repository links the source but does not redistribute a chart 2026-08-16
Learning styles evidence review Learning-principles and vocabulary chapters Pashler et al. Linked research; short paraphrase, no paper stored 2026-08-16
Vocabulary coverage research Vocabulary chapters Hu & Nation (2000), Crossref record, Nation (2006), and Schmitt, Jiang & Grabe (2011) Linked research; the Crossref endpoint is a stable bibliographic metadata record, while findings are paraphrased with limitations and no full text is redistributed 2026-09-01
ChatGPT Study Mode and Projects AI chapters OpenAI Study Mode and Projects Help Product facts paraphrased and dated; availability may change 2026-08-24
Gemini learning features AI chapters Google Gemini Help Product facts paraphrased with region/account limits 2026-08-24
Claude Projects AI chapters Anthropic Help Product facts paraphrased with plan limits 2026-08-24
Wayback blog snapshots docs/threads/archive/ and English translations Internet Archive snapshots where available; original text copyright belongs to the author Restored author text; two original snapshots now return 404 and are marked as unavailable, while surviving snapshots remain linked 2026-09-01
Reference book listing Reading chapters Douban book page and publisher Text link for identification only; no third-party cover image is hotlinked or redistributed 2026-09-01
YouTube and product names/logos Resource lists Respective publishers and trademark owners Links and nominative references only; no endorsement implied 2026-08-16
token.love official homepage docs/projects.md, docs/en/projects.md China Token Cloud / site operator Homepage capability description paraphrased with date and contract boundary; not an independent audit 2026-08-31
ku0.com official homepage docs/projects.md, docs/en/projects.md ku0.com operator Directory positioning paraphrased with date; availability, transactions, and compliance remain subject to current terms 2026-08-31
biezou.com AI gateway homepage Both home pages biezou.com / site operator External service reference; homepage description paraphrased on 2026-09-01; no independent audit or endorsement of availability, pricing, privacy, security, compliance, or returns 2026-09-01
Current guide illustrations and brand assets docs/assets/feature.svg, docs/assets/feature-en.svg, docs/assets/speaking-practice.svg byoungd / project contributors Used by the VitePress theme, public asset sync, or the speaking chapter; included in the content-license scope 2026-09-01
Author project screenshots and visit photos docs/projects.md, docs/en/projects.md Author-provided media Used for disclosure and personal record; not evidence of third-party endorsement 2026-08-16
WeChat profile and practice articles docs/projects.md, docs/threads/part-3/2-ai-development-and-resource-layer.md and English counterparts TokenMany, Wanli Center Paraphrased with source and limitation; narrative material only, no capability, customer, or revenue claim inferred 2026-08-24
Latest personal updates docs/assets/latest/ and both home pages Author-provided media Used with the author's permission for the stated personal updates; EXIF metadata removed before publication 2026-08-20

Contribution Requirements

For new third-party material, record the creator, canonical URL, license or permission, modification status, and access date. Do not commit media whose redistribution rights are unknown. Prefer a text link, an original replacement, or openly licensed media. Remove EXIF and location metadata before committing any photograph.