1. Words Length:
Remove the<?php the_content();?> insert the below code
<?php $content = get_the_content();
$trimmed_content = wp_trim_words( $content, 60, '<a href="'. get_permalink() .'">...[ read more ]</a>' ); ?>
<p><?php echo $trimmed_content; ?></p>
(Change the 60 to your desire words length)
2. Character Length :
Remove the <?php the_content();?> insert the below code
<?php echo substr(strip_tags($post->post_content), 0, 46);?> //(Change the 46 to your desire string length)
