Display the relationship

Hello,

I need your help to display post_title of a custom post type.

My structure consists of three main custom post type : A, B and C.
C and B are connected by an intermediate custom post type CB, and so CB is the child of C and B.
B and A are connected by an intermediate custom post type BA, and so BA is the child of B and A.

On the page C, I can easily display post_title of B with this code:

$child_posts = types_child_posts(‘CB’);
foreach ($child_posts as $child_post) {
$parent_id = wpcf_pr_post_get_belongs($child_post->ID, ‘B’);
echo get_the_title($parent_id)."\n";
}

But I would also display post_title of A on page C. How can I do this ?

Thank you for your answers.

https://wordpress.org/plugins/types/