diff --git a/1_numpy_matplotlib_scipy_sympy/1-numpy_tutorial.ipynb b/1_numpy_matplotlib_scipy_sympy/1-numpy_tutorial.ipynb
index 2dcf94b..d53e832 100644
--- a/1_numpy_matplotlib_scipy_sympy/1-numpy_tutorial.ipynb
+++ b/1_numpy_matplotlib_scipy_sympy/1-numpy_tutorial.ipynb
@@ -11,8 +11,6 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "J.R. Johansson (jrjohansson at gmail.com)\n",
-    "\n",
     "最新的[IPython notebook](http://ipython.org/notebook.html)课程可以在[http://github.com/jrjohansson/scientific-python-lectures](http://github.com/jrjohansson/scientific-python-lectures) 找到.\n",
     "\n",
     "其他有关这个课程的参考书在这里标注出[http://jrjohansson.github.io](http://jrjohansson.github.io).\n"
diff --git a/1_numpy_matplotlib_scipy_sympy/2-matplotlib_tutorial.ipynb b/1_numpy_matplotlib_scipy_sympy/2-matplotlib_tutorial.ipynb
index 40cb41d..0af7c3f 100644
--- a/1_numpy_matplotlib_scipy_sympy/2-matplotlib_tutorial.ipynb
+++ b/1_numpy_matplotlib_scipy_sympy/2-matplotlib_tutorial.ipynb
@@ -438,7 +438,8 @@
    "source": [
     "## 3. References\n",
     "\n",
-    "* [Matplotlib 教程](https://www.runoob.com/w3cnote/matplotlib-tutorial.html)\n",
+    "* [matplotlib 详细教程](matplotlib_full.ipynb)\n",
+    "* [matplotlib 教程](https://www.runoob.com/w3cnote/matplotlib-tutorial.html)\n",
     "* [Pyplot tutorial](https://matplotlib.org/users/pyplot_tutorial.html)\n",
     "* [Image tutorial](https://matplotlib.org/users/image_tutorial.html)\n",
     "* [手把手教你用Python做数据可视化](https://mp.weixin.qq.com/s/3Gwdjw8trwTR5uyr4G7EOg)\n",
diff --git a/1_numpy_matplotlib_scipy_sympy/README.md b/1_numpy_matplotlib_scipy_sympy/README.md
index 543fec4..52164f7 100644
--- a/1_numpy_matplotlib_scipy_sympy/README.md
+++ b/1_numpy_matplotlib_scipy_sympy/README.md
@@ -1,12 +1,15 @@
 # numpy, matplotlib, scipy等常用库
 
 ## 内容
-* [numpy教程](numpy_tutorial.ipynb)
+* [numpy教程](1-numpy_tutorial.ipynb)
 * matplotlib
+    - [matplotlib简易教程](2-matplotlib_tutorial.ipynb)
     - [matplotlib系统学习](matplotlib_full.ipynb)
-    - [matplotlib简易教程](matplotlib_simple_tutorial.ipynb)
-* [scipy](scipy_tutorial.ipynb)
-* [sympy](sympy_tutorial.ipynb)
+* [ipython](3-ipython_notebook.ipynb)
+* [scipy](4-scipy_tutorial.ipynb)
+* [sympy](5-sympy_tutorial.ipynb)
+
+## 扩展内容
 * [git introduction](utils_git.ipynb)
 * [git workflow](utils_git_advanced.ipynb)
 * [shell](utils_shell.ipynbs)
diff --git a/1_numpy_matplotlib_scipy_sympy/matplotlib_full.ipynb b/1_numpy_matplotlib_scipy_sympy/matplotlib_full.ipynb
index 735f65c..aff25ea 100644
--- a/1_numpy_matplotlib_scipy_sympy/matplotlib_full.ipynb
+++ b/1_numpy_matplotlib_scipy_sympy/matplotlib_full.ipynb
@@ -5483,7 +5483,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.2"
+   "version": "3.6.9"
   }
  },
  "nbformat": 4,