Practise advace shortcode and WP_query funtions.

WP_query and shortcode

<?php
/*
Shortcode practise
*/

function query_shortcode($attr, $content = null) {
	extract( shortcode_atts( array(
		'type'		=> 'post',
		'count'		=> 3,

	), $attr));

	$args = array(
		'post_type'			=> $type,
		'posts_per_page'	=> $count,
	);

	$query = new WP_Query($args);

	$html_part = '<div class="container">
				 	<div class="row">';

	while($query->have_posts()) : $query->the_post();
	$id_info = get_the_id();
	
	$html_part .= '<div class="cold-md-4">
				  	<div class="signle-item">
				  		<h2><a href="'.get_permalink().'">'.get_the_title().'</a></h2>
				  		<p>'.get_the_content().'</p>
				  	</div>
				  </div>';
	endwhile;

	$html_part .= '</div></div>';

	wp_reset_query();

	return $html_part;
}

add_shortcode('my_shortcode', 'query_shortcode');