# Official sources

Use this reference only when you need source grounding for Alibaba Cloud billing and cost management 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/maxcompute/latest/billing-overview
- https://www.alibabacloud.com/help/en/maxcompute/latest/maxcompute-query-acceleration
- https://www.alibabacloud.com/help/en/ecs/user-guide/spot-instances
- https://www.alibabacloud.com/help/en/auto-scaling/latest/what-is-auto-scaling
- https://www.alibabacloud.com/help/en/cost-management/latest/overview
- https://www.alibabacloud.com/help/en/cost-management/latest/budget-alerts
- https://www.alibabacloud.com/help/en/cdn/user-guide/billing-overview
- https://www.alibabacloud.com/help/en/oss/product-overview/billing-overview

## Grounding rule

Official documentation explains Alibaba Cloud billing model behavior and feature availability. It does not prove the user's current billing state, spend trend, alert configuration, or notification delivery status. Prefer live Alibaba Cloud Cost Management console evidence or sanitized user-provided billing reports for current-state claims. CN-* mainland China billing accounts and international accounts are separate systems — do not assume data or alert configuration transfers between them.
