git bash退回上一个文件夹

cd ..\

a@w3311 MINGW32 /f/Projects/crm (master)
$ cd..\
>
bash: cd..: command not found

a@w3311 MINGW32 /f/Projects/crm (master)
$ cd ..\
>

a@w3311 MINGW32 /f/Projects (master)
$