How do I move a group of nodes to another Drupal instance?
What would suit you is the Deploy module: https://www.drupal.org/project/deploy

The README.txt states:

The Deploy module is used to deploy Drupal content to other Drupal sites or arbitrary systems. Two concrete use cases are:


using it as a content staging solution
using it to push content downstream from a main site to several sub sites.


Here's a demo:
https://www.youtube.com/watch?v=7PjwT0HWHxw