List WooCommerce Product by Total sales

woo.php

<?php
$args = array(
    'post_type' => 'product',
    'meta_key' => 'total_sales',
    'orderby' => 'meta_value_num',
    'posts_per_page' => 1,
);
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post(); 
global $product; ?>
<p>
<h3><?php the_title(); ?></h3>
</p>
<?php endwhile; ?>
<?php wp_reset_query(); ?>