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With this plug-in, you can use shortcodes to output list of children pages or sitemap. 
Write following shortcode in your post text.
Generate a sitemap : [get_sitemap] 
Generate a list of child and descendant pages: [get_childlist]
You can also customize output with optional arguments:
[get_childlist id=”parentID (optional)” add=”additional element (optional)” exclude=”exclude page by id (optional, e.g. exclude=”34,123,35,23″)” exclude_by_slug=”exclude page by slug (optional, e.g. exclude_by_slug=”test,hoge,home”)]

ShortCode – Get Child List

This plugin provide two shortcode. Using the shortcode you can easily generate a childpage list, and also a sitemap.

Andy Stratton

Use an HTML comment to list links of the current page’s children or siblings.
Common usage is for content sites utilizing WordPress as a simple CMS. Some content hierarchies call for an Overview page followed by multiple subpages, for example, a Services page.
Use the following shortcodes to list children and or siblings of the current page:
Alphabetical listing of current page’s children:
[list_children sort_column=”page_title” sort_order=”asc”]
List of current page’s siblings, ordered by menu order (descending):
[list_siblings sort_column=”menu_order” sort_order=”desc”]
You can use a majority of the attributes from the wp_list_pages() call: https://codex.wordpress.org/Function_Reference/wp_list_pages
The following will no longer work (deprecated):
<ul> 
<!–list_children()–> 
</ul>

List Children

Use an HTML comment to list links of the current page's children or siblings.

ShortCode – Get Child List vs List Children