问如何将帖子数量限制为查询中最近的6篇文章？

EN

/*
 * Template name: Blog Landing
 */
global $faar_opt, $wp_query;

$acf_fields = get_fields();
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;

$categories = get_field('categories_of_blog', $post->id);
// pretty sure this is what i need to modify, as it has 'featured_item' (the checkbox)
$args = array(
    'post_type' => 'post',
    'posts_per_page' => 8,
    'category__in' => $categories,
    'meta_query' => array(
        array(
            'key' => 'featured_item',
            'value' => '1'
        )
    ),
);
$related_posts = new WP_Query($args);

$args = array(
    'post_type' => 'post',
    'posts_per_page' => 4,
    'paged' => $paged,
    'orderby' => 'date',
    'category__in' => $categories
);

if(isset($wp_query->query_vars['blog_tag'])){
    $args['tag'] = $wp_query->query_vars['blog_tag'];
    $current_tag = get_term_by('slug', $wp_query->query_vars['blog_tag'], 'post_tag');
}

if(isset($wp_query->query_vars['blog_author'])){
    $current_author = get_user_by('login', urldecode($wp_query->query_vars['blog_author']));
    $args['author'] = $current_author->ID;
}

$all_posts = new WP_Query($args);

// each li is a slide, which is pulling 128, and needs to only be most recent 6

  have_posts()): $related_posts->the_post();
    $author = get_user_by('id', $post->post_author);
   ?>
    
     // slide content (removed for simplicity. Tell me if you need it.