diff --git a/files/courses/se2023.html b/files/courses/se2023.html
index 2156486..88814ef 100644
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@@ -66,7 +66,7 @@
 
   <tr>
     <td>28 Sep.</td>
-    <td>Introduction of Mobile App Development (Guest Lecturer: Prof. Liangyu Chen) <br></td>
+    <td>Introduction of Mobile App Development<br>(Guest Lecturer: Prof. Liangyu Chen) <br></td>
 	<td><a href="">飞书群</a> 
 	</td>
   </tr>
@@ -255,7 +255,7 @@
 
 <br><br>
 
-更新日期：2023/9/13
+更新日期：2023/10/12
 <br><br>
 <i>Acknowledgement: Some course slides are adapted from Ivan Marsic's lectures from Rutgers University.</i>