I'd like to use wordpress's own theme as a new line for the explanatory text of the post.

I am creating my own theme for wordpress.
"I would like to break the ""first few lines of the article"" displayed under the article title in the list of articles posted on the top page."

When I put a new line on the Edit Post screen, it doesn't take effect.

PHP

<div class="box">
<h2>Work Information</h2>
<p><?php the_title();?>/p>
<p>Date:<?php the_time('n month j');?>/p>
<p><?php the_excerpt();?>/p>
</div>

Currently

Ideal