Example Code in Block_1_View.php

public function render_block_type_1( $post, $image_size ) {
    $thumbnail        = $this->get_thumbnail( $post->ID, $image_size );
    $primary_category = $this->get_primary_category( $post->ID );
    $tags = get_the_tags( $post->ID ); // get the tag
    $tag = implode( ' ', apply_filters( 'limit_tag', $tags ) ); // filter tag and array to string
    $output =
        "<div class=\"jeg_thumb\">
            " . jnews_edit_post( $post->ID ) . "
            <a href=\"" . get_the_permalink( $post ) . "\">" . $thumbnail . "</a>
            <div class=\"jeg_post_category\">
                <span>{$primary_category}</span>
            </div>
        </div>
        <div class=\"jeg_postblock_content\">
            <h3 property=\"headline\" class=\"jeg_post_title\">
                <a href=\"" . get_the_permalink( $post ) . "\">" . get_the_title( $post ) . "</a>
            </h3>
            " . $this->post_meta_1( $post ) . "
            <div class=\"jeg_post_excerpt\">
                <p>" . $this->get_excerpt( $post ) . "</p>
                <p>" . $tag /* display the tag */ . "</p>
                <a href=\"" . get_the_permalink( $post ) . "\" class=\"jeg_readmore\">" . jnews_return_translation( 'Read more', 'jnews', 'read_more' ) . "</a>
            </div>
        </div>";

    return $output;
}