diff --git a/courseware/intro.md b/courseware/intro.md
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--- a/courseware/intro.md
+++ b/courseware/intro.md
@@ -1,3 +1,13 @@
-#this folder is for courseware, will produce slides based on the outline of the course. 
+#this folder is for courseware, will produce slides based on the outline of the course.  ***此文件夹为课程课件***
+
+## 实践课程的课件: requirements
+
+1, Version control with git: How to use git?
+
+2, Practice in Github: how to use github?: Open a repo, fork a repo, start discussion/issue, submit pr
+
+3, Select a project/task to contribute: understand what good first issue (GFI) is at GitHub, skim over the repos that have GFI, locate GFIs to understand what skills they require (with examples).
+
+4, Practice of making contribution: understand the protocol of a project: reading CONTRIBUTING.MD -- understand what it says about how to make contribution (with an example).
+
 
-## 此文件夹为课程课件