diff --git a/lib_base/README.md b/lib_base/README.md
index 527c57e..67a3b86 100644
--- a/lib_base/README.md
+++ b/lib_base/README.md
@@ -17,4 +17,12 @@
 ##  2 Environment
 
 - AndroidStudio 3+
-- Java8 with desugar
\ No newline at end of file
+- Java8 with desugar
+
+## 3 How do we make Dagger2 working with SavedStateViewModel?
+
+refer
+
+- [saving-ui-state-with-viewmodel-savedstate-and-dagger](https://proandroiddev.com/saving-ui-state-with-viewmodel-savedstate-and-dagger-f77bcaeb8b08#7f89)
+- [AssistedInject](https://github.com/square/AssistedInject/issues/81)
+- [github-commit-browser](https://github.com/Nimrodda/github-commit-browser)