diff --git a/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.ipynb b/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.ipynb
index 6eb615e..d1759b5 100644
--- a/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.ipynb
+++ b/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.ipynb
@@ -397,8 +397,10 @@
    "source": [
     "## References\n",
     "\n",
+    "\n",
     "* [Pyplot tutorial](https://matplotlib.org/users/pyplot_tutorial.html)\n",
-    "* [Image tutorial](https://matplotlib.org/users/image_tutorial.html)"
+    "* [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)"
    ]
   }
  ],
diff --git a/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.py b/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.py
index 5e40e2c..025cc1e 100644
--- a/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.py
+++ b/0_numpy_matplotlib_scipy_sympy/matplotlib_simple_tutorial.py
@@ -119,5 +119,7 @@ plt.hist(lum_img.ravel(), bins=256, range=(0.0, 1.0), fc='k', ec='k')
 
 # ## References
 #
+#
 # * [Pyplot tutorial](https://matplotlib.org/users/pyplot_tutorial.html)
 # * [Image tutorial](https://matplotlib.org/users/image_tutorial.html)
+# * [手把手教你用Python做数据可视化](https://mp.weixin.qq.com/s/3Gwdjw8trwTR5uyr4G7EOg)
diff --git a/README.md b/README.md
index 1ddca63..b414789 100644
--- a/README.md
+++ b/README.md
@@ -20,3 +20,4 @@
 * [安装Python环境](tips/InstallPython.md)
 * [confusion matrix](tips/confusion_matrix.ipynb)
 * [一些速查手册](tips/cheatsheet)
+* [Python tips](tips/python)