Create a new branch is quick. Git is a distributed verson control system. Git is a free sotfware distributed under the GPL. Git has a mutable index called stage. Git tracks changes of files. Creating a new branch is quick and simple. add merge --no--ff. change something. Push Dev Test my changes feihong change the world <<<<<<< HEAD I tried to push my modification ======= my first push,and faster than you! >>>>>>> e38685d08348ec9863a9ebc3ef85b97e92ae291d