diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c64d91a7eb..aef14e6630 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -294,6 +294,18 @@ This reduces unnecessary CI runs. \
 Don't worry about merge commits messing up your commit history as every PR will be squash merged. \
 This means that all changes are joined into a single new commit whose message is as described below.
 
+### Reviewing PRs
+
+Maintainers are encouraged to review pull requests in areas where they have expertise or particular interest. When reviewing, please keep the following principles in mind:
+
+- Ensure the PR summary accurately reflects the changes, and verify that the tests and documentation are complete and aligned with the implementation.
+
+- Provide actionable feedback. Clearly explain what needs to be changed and why, and distinguish between required changes and optional suggestions.
+
+- If you request changes (i.e., block a PR), you must provide a clear rationale and, whenever possible, outline a concrete path to resolution. Reviews that do not include sufficient explanation are not constructive and may be disregarded.
+
+- Only approve a PR when you are fully satisfied with its current state.
+
 ### Getting PRs merged
 
 Changes to Gitea must be reviewed before they are accepted — no matter who