diff --git a/README.md b/README.md
index 5241466..b991bea 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
+[![](images/coding.png)](https://e.coding.net/?utm_source=huiha&utm_medium=banner&utm_campaign=march2019)
+
 <div align="center">
-<a href="https://e.coding.net/?utm_source=huiha&utm_medium=banner&utm_campaign=march2019"><img src="images/ad-coding.png" width="700"></a>
-<br>
 📘 Summary
 &nbsp&nbsp&nbsp | &nbsp&nbsp&nbsp
 <a href="https://github.com/huihut/interview/blob/master/README_Details.md">📖 Details</a>
diff --git a/README_Details.md b/README_Details.md
index 81e594a..0650ced 100644
--- a/README_Details.md
+++ b/README_Details.md
@@ -1,5 +1,5 @@
 <div align="center">
-<a href="https://e.coding.net/?utm_source=huiha&utm_medium=banner&utm_campaign=march2019"><img src="images/ad-coding.png" width="700"></a>
+<a href="https://e.coding.net/?utm_source=huiha&utm_medium=banner&utm_campaign=march2019"><img src="images/coding.png" width="700"></a>
 <br>
 <a href="https://github.com/huihut/interview">📘 Summary</a>
 &nbsp&nbsp&nbsp | &nbsp&nbsp&nbsp
diff --git a/images/ad-coding.png b/images/coding.png
similarity index 100%
rename from images/ad-coding.png
rename to images/coding.png