mkdir core_development_of_javascript
cd core_development_of_javascript
git init
touch README.md
git add README.md
git commit -m "first commit"
git remote add origin https://gitee.com/kennana/core_development_of_javascript.git
git push -u origin master

cd existing_git_repo
git remote add origin https://gitee.com/kennana/core_development_of_javascript.git
git push -u origin master