Update README.md

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Author: dyc87112

README.md

@@ -25,15 +25,15 @@
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-            <a href="http://gk.link/a/103EK" target="_blank">
-              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/sponsor/git-springboot-sponsor-4.jpg?raw=true">
+            <a href="https://www.aliyun.com/1111/2019/group-buying-share?ptCode=1946814D2840EE4FEC0971C48B9B5785647C88CF896EF535&userCode=wxfqkr0o&share_source=copy_link" target="_blank">
+              <img width="300" src="http://blog.didispace.com/assets/adv/aliyun_360_120.jpg">
             </a>
           </td> 
           <td align="center" valign="middle">
-            <a href="https://promotion.aliyun.com/ntms/act/ambassador/sharetouser.html?userCode=wxfqkr0o&utm_source=wxfqkr0o" target="_blank">
-              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/sponsor/git-springboot-sponsor-2-300x100.jpg?raw=true">
+            <a href="http://gk.link/a/103EK" target="_blank">
+              <img width="300" src="https://github.com/dyc87112/SpringBoot-Learning/blob/master/sponsor/git-springboot-sponsor-4.jpg?raw=true">
             </a>
-          </td>     
+          </td> 
         </tr>
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