Migration of older easy blog posts to new easy blog in sub-directory

i have an older joomla 2.5 site with an older easy blog installed, we are going to rebuild the site in a sub directory upgrading it to joomla 3.7, so we would also like to install the latest version of easy blog and migrate the blog posts from the older site to the new build. do you have any documentation showing me how to migrate older blog posts to a new site build and latest version of easy blog?