diff --git a/python/2_LearnPython/03.Number_and_Variables.md b/python/2_LearnPython/03.Number_and_Variables.md
index 5cdf30e..6dcd622 100644
--- a/python/2_LearnPython/03.Number_and_Variables.md
+++ b/python/2_LearnPython/03.Number_and_Variables.md
@@ -2,6 +2,14 @@
 
 ## 3.1 Learn Python Variables
 
+Resource of lean Python Variable 
+
+- <https://www.learnpython.org/en/Variables_and_Types>
+- <https://www.w3schools.com/python/python_variables.asp>
+  - <https://www.w3schools.com/python/python_numbers.asp>
+  - <https://www.w3schools.com/python/python_strings.asp>
+
+
 ### 3.1.1 Let Python do math for you
 
 Math is the basic function of the Python, please try below code and learn the basic operation of "+,-,*, /, %"