Contribute-to-Git:-A-beginner's-Guide.md

@@ -73,7 +73,17 @@ of review.
 See [Getting Ready to Share: Anatomy of a Patch Series](https://git-scm.com/docs/MyFirstContribution#ready-to-share)
 for a more detail explanation.
 
-## Extract patch from mailing list
+## Extract patches from mailing list
+
+Sometimes, you would want to extract from the mailing list and apply them to your branch. Here is a possible process
+1. use `b4` to exact patches from the mailing list
+2. use `git am` to apply the patches
+```
+b4 am -o- https://lore.kernel.org/git/20220728230210.2952731-1calvinwan@google.com/ | git am
+b4 am -P 1 https://lore.kernel.org/git/20220728230210.2952731-2-calvinwan@google.com/ | git am
+```
+
+Besides that, [Patchwork](https://patchwork.kernel.org/project/git/list/) is a place to store patches, you can manually download patches from it.
 
 # Build from source and IDE setup