diff --git a/book/chapter-01-run-and-talk.md b/book/chapter-01-run-and-talk.md
index 3bdf7848..63608754 100644
--- a/book/chapter-01-run-and-talk.md
+++ b/book/chapter-01-run-and-talk.md
@@ -55,6 +55,7 @@ Notes:
 2. Run tests by `npm test`.
 
 ##Test by PowerShell
+
 ![npm test](https://user-images.githubusercontent.com/65977273/94598386-3e977d80-0265-11eb-93e8-ca3013c3f1e1.png)