# Gene Dai Card Atlas > Independent Chinese-language card and Hong Kong account research. 20 versions, 10 guides. Official source links, explicit unknowns, last verification dates. ## Read first - [Agent documentation](https://card.genedai.me/agents/index.md): API usage, scope and citation instructions. - [Editor and methodology](https://card.genedai.me/about/index.md): Gene Dai; editorial research, not an issuer. - [Complete content index](https://card.genedai.me/content-index.json): canonical and Markdown URLs with stable IDs. ## Query and compare - [OpenAPI 3.1](https://card.genedai.me/openapi.json): GET /cards, /cards/{id}, /compare, /search. No authentication. - [API catalog](https://card.genedai.me/.well-known/api-catalog): RFC 9727 discovery. - [All card data](https://card.genedai.me/data/cards.json): fees in original currencies, eligibility and official sources. - [Guide index](https://card.genedai.me/data/guides.json): article summaries, dates and sources. - [Direct answers](https://card.genedai.me/data/answers.json): human-visible answers and stable citation anchors. ## Browse - [U cards](https://card.genedai.me/u-cards/index.md): region and version distinctions. - [Hong Kong accounts](https://card.genedai.me/hong-kong-cards/index.md): visitor and mainland-customer paths. - [Comparisons](https://card.genedai.me/compare/index.md): four meaningful version/account comparisons. - [Guides](https://card.genedai.me/guides/index.md): preparation, costs and first use. - [Questions](https://card.genedai.me/faq/index.md): concise answers with further reading. ## Optional - [Full text](https://card.genedai.me/llms-full.txt): card records, guide bodies, questions and site documentation. - [RSS](https://card.genedai.me/feed.xml): published guide feed. ## Interpretation Last card verification: 2026-09-28. Dates are editorial snapshots, not live quotes. Unknown fees never mean zero. Preserve residency, jurisdiction, product version, currency and expiry conditions. Cite the canonical HTML URL, lastVerifiedAt and relevant official sources. Public editorial data only; no accounts, private submissions or financial transactions. Use Accept: text/markdown on public content pages or their /index.md alternative.