Update module-introduction.md (#140)
diff --git a/source/guide/set-up-env.md b/source/guide/set-up-env.md
index ca2150c..ceb8142 100644
--- a/source/guide/set-up-env.md
+++ b/source/guide/set-up-env.md
@@ -54,7 +54,7 @@
 
 ### Usage
 
-The `weex-toolkit` will prompt you whether to automatically run `npm install`, if not running, manually into the folder and run `npm install`.
+The `weex-toolkit` will prompt you whether to automatically run `npm install`, if not running, manually `cd` into the folder and run `npm install`.
 
 In the `awesome-project` folder, install dependencies with the following command: