how to keep a post at the top of specified category

Try adding something like:

<?php
if(is_category('Cat Name')) :
$top_post = get_posts('p=27');
foreach($top_post as $post) :
setup_postdata($post);
?>
<h2><a href="<?php the_permalink(); ?>" id="post-<?php the_ID(); ?>"><?php the_title(); ?></a></h2>
<?php the_content(); ?>
<?php endforeach; ?>
<?php endif;?>

to your catgeory template file.

https://codex.www.ads-software.com/Template_Tags/get_posts

thank you sooooo much