diff --git a/docs/README.md b/docs/README.md
index 5e90199..a3f5eb5 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -18,7 +18,7 @@
 
 <img src="https://raw.githubusercontent.com/datawhalechina/easy-rl/master/docs/res/mogu.png" width="300">
 
-推荐购买链接：[京东](https://u.jd.com/tG2sxLb) 
+推荐购买链接：[京东](https://u.jd.com/tG2sxLb) | [当当](http://product.dangdang.com/29374163.html) 
 
 <table border="0">
   <tbody>
@@ -27,6 +27,10 @@
          <img width="120" height="120" src="https://raw.githubusercontent.com/datawhalechina/easy-rl/master/docs/res/qrcode_jingdong.jpg" alt="pic">
         <br>
         <p>推荐京东扫码购买</p>
+              </td>
+    <td>
+    <img width="120" height="120" src="https://raw.githubusercontent.com/datawhalechina/easy-rl/master/docs/res/qrcode_dangdang.png" alt="pic"><br>
+    <p>当当扫码购买</p>
       </td>
     </tr>
   </tbody>