https://github.com/12306NgTG/12306NgTG.git

Create a new repository on the command line
touch README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin https://github.com/12306NgTG/12306NgTG.git
git push -u origin master

Push an existing repository from the command line

git remote add origin https://github.com/12306NgTG/12306NgTG.git
git push -u origin master