> For the complete documentation index, see [llms.txt](https://mind-expression-docs.gitbook.io/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mind-expression-docs.gitbook.io/home/how-to-guides/build-q-and-a-subjects.md).

# Build Q\&A Subjects

- [Case 1. Online Payment](https://mind-expression-docs.gitbook.io/home/how-to-guides/build-q-and-a-subjects/case-1.-online-payment.md)
- [Case 2. Data Plans](https://mind-expression-docs.gitbook.io/home/how-to-guides/build-q-and-a-subjects/case-2.-data-plans.md)