diff --git a/02.05 神经网络学习(学生版).ipynb b/02.05 神经网络学习(学生版).ipynb
index cc9da9e..e3d4dca 100644
--- a/02.05 神经网络学习(学生版).ipynb
+++ b/02.05 神经网络学习(学生版).ipynb
@@ -269,7 +269,7 @@
     "+ 输入层和输出层之间存在若干隐藏层。\n",
     "+ 每个隐藏层中包含若干神经元。\n",
     "\n",
-    "神经网络流程：\n",
+    "通过下面几个小视频，你会更好的理解神经网络：\n",
     "<center><video src=\"./nn_media1.mp4\" controls=\"controls\" width=800px></center>\n",
     "<center><video src=\"./nn_media2.mp4\" controls=\"controls\" width=800px></center>\n",
     "<center><video src=\"./nn_media3.mp4\" controls=\"controls\" width=800px></center>\n",
diff --git a/02.05 神经网络学习.ipynb b/02.05 神经网络学习.ipynb
index 0af1692..bb5a5d9 100644
--- a/02.05 神经网络学习.ipynb
+++ b/02.05 神经网络学习.ipynb
@@ -271,7 +271,7 @@
     "+ 输入层和输出层之间存在若干隐藏层。\n",
     "+ 每个隐藏层中包含若干神经元。\n",
     "\n",
-    "神经网络流程：\n",
+    "通过下面几个小视频，你会更好的理解神经网络：\n",
     "<center><video src=\"./nn_media1.mp4\" controls=\"controls\" width=800px></center>\n",
     "<center><video src=\"./nn_media2.mp4\" controls=\"controls\" width=800px></center>\n",
     "<center><video src=\"./nn_media3.mp4\" controls=\"controls\" width=800px></center>\n",
diff --git a/SimHei.ttf b/SimHei.ttf
deleted file mode 100644
index 0875c08..0000000
Binary files a/SimHei.ttf and /dev/null differ