# Official sources

Use this reference only when you need source grounding for Alibaba Cloud OSS or NAS service behavior or the detailed source list.

## Alibaba Cloud documentation

Use these as starting points, not as proof of the user's live Alibaba Cloud state:

- https://www.alibabacloud.com/help/en/oss
- https://www.alibabacloud.com/help/en/nas

## Grounding rule

If live Alibaba Cloud tooling is unavailable, say: "I can't query live state here, so I'm falling back to official Alibaba Cloud docs." Then fall back to these sources and sanitized user evidence.
