magento 2 display sub category with image at category

<!--?php 
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
?-->
<!--?php 
/**
 * Category view template
 *
 * @var $block \Magento\Catalog\Block\Category\View
 */
?-->
<!--?php $category = $block-&gt;getCurrentCategory(); ?-->
<!--?php $subcategories = $category-&gt;getChildrenCategories(); ?-->
<!--?php $_helper = $this-&gt;helper('Magento\Catalog\Helper\Output'); ?-->
<!--?php $objectManager = \Magento\Framework\App\ObjectManager::getInstance(); ?-->
<!--?php if(count($subcategories) &gt; 0): ?-->
<div class="products wrapper grid products-grid">
<ol class="products list items product-items">
 	<li style="list-style-type: none;">
<ol class="products list items product-items"><!--?php $subcategory = $objectManager-&gt;create('Magento\Catalog\Model\Category')-&gt;load($subcategory-&gt;getId()); ?-->
 	<li class="item product product-item">
<div class="product-item-info"><!--?php if ($_imgUrl = $subcategory-&gt;getImageUrl()): ?-->
<a class="product photo product-item-photo" href="&lt;?= $subcategory-&gt;getUrl() ?&gt;">
<span class="product-image-container">
<!--?php $_imgHtml = '&lt;img src="' . $_imgUrl . '" ?-->'; ?&gt;
<!--?php echo $_imgHtml = $_helper-&gt;categoryAttribute($subcategory, $_imgHtml, 'image'); ?-->
</span>
</a>
<!--?php endif; ?-->
<div class="product details product-item-details"><strong class="product name product-item-name">
<!--?= $subcategory-&gt;getName() ?-->
</strong></div>
</div></li>
</ol>
</li>
</ol>
</div>
<!--?php else: ?-->
<!--?php if (!$block-&gt;isContentMode() || $block-&gt;isMixedMode()): ?-->
<!--?= $block-&gt;getProductListHtml() ?-->
<!--?php endif; ?-->
<!--?php endif; ?-->