diff --git a/README.md b/README.md
index 7b7a5cb..0c8dc9a 100644
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ Surrounding Semantic Occupancy Perception Course for Autonomous Driving
     </details>
     </td>
     <td>
-	[<a href="Chapter01-BEV感知概述/占据网络专题-第二章-占据网络概述.mp4"><code>📹</code> Video</a>] | [<code><img height="18" src="https://user-images.githubusercontent.com/29084184/127970991-fcb23d68-8369-47af-918a-fef8f0becccd.png" alt="Baidu Cloud" title="Baidu Cloud" style="vertical-align:bottom;"/></code><a href="https://pan.baidu.com/s/1gEZuL8Wk1CUm0teRW5cQjg">百度网盘</a>] 提取码: swvc 
+	[<a href="Chapter01-BEV感知概述/占据网络专题-第一章-BEV感知概述.pptx"><code>📹</code> Video</a>] | [<code><img height="18" src="https://user-images.githubusercontent.com/29084184/127970991-fcb23d68-8369-47af-918a-fef8f0becccd.png" alt="Baidu Cloud" title="Baidu Cloud" style="vertical-align:bottom;"/></code><a href="https://pan.baidu.com/s/1hDjWfMyh0gM81RNUlUhXuA">百度网盘</a>] 提取码: mnee
     </td>
     <td>
       [PPT]() | [百度网盘]
@@ -153,10 +153,10 @@ Surrounding Semantic Occupancy Perception Course for Autonomous Driving
     </details>
     </td>
     <td>
-     [<a href="Chapter02-占据栅格网络概述/占据网络专题-第二章-占据网络概述.mp4"><code>📹</code> Video</a>] | [<code><img height="18" src="https://user-images.githubusercontent.com/29084184/127970991-fcb23d68-8369-47af-918a-fef8f0becccd.png" alt="Baidu Cloud" title="Baidu Cloud" style="vertical-align:bottom;"/></code><a href="https://pan.baidu.com/s/1W3POk6IOTXzbllZUI9L1-Q">百度网盘</a>] 提取码: 1dp7 
+     [<a href="Chapter02-占据栅格网络概述/占据网络专题-第二章-占据网络概述.mp4"><code>📹</code> Video</a>] | [<code><img height="18" src="https://user-images.githubusercontent.com/29084184/127970991-fcb23d68-8369-47af-918a-fef8f0becccd.png" alt="Baidu Cloud" title="Baidu Cloud" style="vertical-align:bottom;"/></code><a href="https://pan.baidu.com/s/1FBH8EjO5YeCdPMIQ-JlPUg">百度网盘</a>] 提取码: akkb
     </td>
     <td>
-      [PPT]() | [百度网盘]
+      [PPT]() | [百度网盘]()
     </td>
     <td>
     </td>
@@ -176,10 +176,10 @@ Surrounding Semantic Occupancy Perception Course for Autonomous Driving
 </details>
     </td>
     <td>
-     [📹 Video] | [百度网盘]
+     [📹 Video] | [百度网盘]()
     </td>
     <td>
-      [PPT]() | [百度网盘]
+      [PPT]() | [百度网盘]()
     </td>
     <td>
     </td>
@@ -216,10 +216,10 @@ Surrounding Semantic Occupancy Perception Course for Autonomous Driving
 </details>
     </td>
     <td>
-      [📹 Video] | [百度网盘]
+      [📹 Video] | [百度网盘]()
     </td>
     <td>
-      [PPT]() | [百度网盘]
+      [PPT]() | [百度网盘]()
     </td>
     <td>
     </td>
@@ -241,10 +241,10 @@ Surrounding Semantic Occupancy Perception Course for Autonomous Driving
 </details>
     </td>
     <td>
-     [📹 Video] | [百度网盘]
+     [📹 Video] | [百度网盘]()
     </td>
     <td>
-      [PPT]() | [百度网盘]
+      [PPT]() | [百度网盘]()
     </td>
     <td>
     </td>
@@ -337,11 +337,9 @@ scripts/goto_dev_docker.sh
   <p>
     <img src="https://github.com/Charmve/OccNet-Course/assets/29084184/b7c61b9d-ddb0-4527-b0c6-16fc7a08ecfc">
     <br> 图4 课程源代码
-  </p>
-
-  <br>
+  </p><br>
   <p>
-    <img src="https://github.com/Charmve/OccNet-Course/assets/29084184/9fd622fc-a17d-4f2d-ba1a-28dacf64c623">
+    <img src="https://github.com/Charmve/OccNet-Course/assets/29084184/ac259bc8-8cd9-4fab-9caf-ca071df0b3a8" alt="图5 课件PPT">
     <br> 图5 课件PPT
   </p>
 </div>
@@ -406,4 +404,4 @@ vip专享8折优惠券
 
 <br><br>
 
-![@Maiwei.ai](src/assert/maiwei_ai.png)
\ No newline at end of file
+<img width="360" src="src/assert/maiwei_ai.png" alt="@Maiwei.ai">