update README.md.

README.md

@@ -1,3 +1,6 @@
+<p align="center">
+    <img src="https://images.gitee.com/uploads/images/2020/1202/153909_19b8ab89_1491977.png" />
+</p>
 <p align="center">
     <img src="https://images.gitee.com/uploads/images/2018/1214/151026_2299df23_892944.gif" />
 </p>