Thanks for your reply. Here is my scenario:
I created a parent confluence page called 'all missions', and there are several teams creating their mission page under it. I'd like to give unique readable id for each children page, because we have another system want to link those missions, mission name is too long, we prefer to have id for each mission
BTW, i don't want to add ID manually because they are too many.
each Confluence page has an id, but often, it is not visible. You can see this id e.g. if you edit a page (look at the url).
You can get the page id with a user macro that ouputs:
Put that macro on every page and then you can create links to the pages:
An external link to the page with the page id 123456 looks like that
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