更新README.md

README.md

 # 《深入浅出ASP.NET Core》的配套源代码
 
 
-<div class="ad" style="text-align: center; padding-bottom: 30px;"><a href="https://item.jd.com/10021324681359.html" onclick="buy(&quot;img&quot;)" title="点击购买" target="_blank"><img style="height:250px;box-shadow:#aaa 5px 5px 10px" src="https://img14.360buyimg.com/n1/jfs/t1/128134/6/12027/162977/5f57901bEd3f96d4e/48b7cf4f80caf708.jpg"></a><br><a class="buy-btn" onclick="buy(&quot;btn&quot;)" href="https://item.jd.com/10021324681359.html" title="点击购买" target="_blank">购买实体书</a></div>
+<div class="ad" style="text-align: center; padding-bottom: 30px;"><a href="https://item.jd.com/10021324681359.html" onclick="buy(&quot;img&quot;)" title="点击购买" target="_blank"><img style="height:250px;box-shadow:#aaa 5px 5px 10px" src="https://img14.360buyimg.com/n1/jfs/t1/128134/6/12027/162977/5f57901bEd3f96d4e/48b7cf4f80caf708.jpg"></a>
+
+<br>
+
+<a class="buy-btn" onclick="buy(&quot;btn&quot;)" href="https://item.jd.com/12720785.html" title="点击购买" target="_blank">购买实体书</a>
+</div>
 
 
 销售地址：[深入浅出 ASP.NET Core](https://item.jd.com/12720785.html)
@@ -12,7 +17,7 @@
 ### 镜像地址
 
 
-（国内加速码云）地址： https://gitee.com/yoyocms/MockSchool
+（国内加速码云）Gitee地址： https://gitee.com/yoyocms/MockSchool
 
 Github地址：https://github.com/ltm0203/MockSchool