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You cannot creat your own repo for contribution purpose.

@manishmike10, thanks for reply!
I created the repo is not only for contribution purpose, I actually want to migrate my blog to there. Maybe as you know, github page only support static website. I am studying how to support whole website include database or something.

For this tutorial, I really cannot find suitable existing github repo for this. So I have to create my own. If it really disrupts the Utopian rule, sorry for that.
Thanks you again!