这对WordPress来说可能有点挑战性，因为它不知道您指的是文章、页面还是分类法。不过，请将您的分类法重命名为product_category 并尝试将post类型参数中的slug改为system/%product_category%, 在你的分类论点中system. WordPress现在应该处理/system/your-product-category/post-name/

现成的WordPress无法识别永久链接结构标记%product\\u category%，因此我们需要声明它：

function filter_post_type_permalink($link, $post)
{
    if ($post->post_type != \'system\')
        return $link;

    if ($cats = get_the_terms($post->ID, \'product_category\'))
        $link = str_replace(\'%product_category%\', array_pop($cats)->slug, $link);
    return $link;
}
add_filter(\'post_type_link\', \'filter_post_type_permalink\', 10, 2);

NOTES:

首先DO NOT USE SAME POST TYPE & TAXONOMY, 事实上，您甚至不需要注册分类法，因为您需要类别。使用以下代码：

add_action( \'init\', \'create_post_type\' );
function create_post_type() {
    register_post_type( \'system\',
        array(
            \'labels\' => array(
                \'name\' => __( \'Systems\' ),
                \'singular_name\' => __( \'System\' )
            ),
        \'capability_type\' => \'post\',
        \'supports\' => array(\'title\',\'editor\',\'comments\'),   
        \'public\' => true,
        \'has_archive\' => true,
        \'rewrite\' => array( \'slug\' => \'%category%\' ),
        \'taxonomies\' => array(\'category\')
        )
    );
}

function replace_system_type_category( $post_link, $id = 0 ){
    $post = get_post($id);  
    if ( is_object( $post ) ){
        $terms = wp_get_object_terms( $post->ID, \'category\' );
        if( $terms ){
            return str_replace( \'%category%\' , $terms[0]->slug , $post_link );
        }
    }
    return $post_link;  
}
add_filter( \'post_type_link\', \'replace_system_type_category\', 1, 3 );

这是我在本地测试的内容，它显示了您在设置页面中创建的分类类型名称，代码添加到分类归档页面上的permalink中。

add_action( \'init\', \'wpsites_create_custom_taxonomy_types\' );
function wpsites_create_custom_taxonomy_types() {

register_taxonomy( \'system-type\', \'system\',
    array(
        \'labels\' => array(
            \'name\'          => _x( \'Types\', \'taxonomy general name\', \'wpsites\' ),
            \'add_new_item\'  => __( \'Add New System Type\', \'wpsites\' ),
            \'new_item_name\' => __( \'New System Type\', \'wpsites\' ),
        ),
        \'exclude_from_search\' => true,
        \'has_archive\'         => true,
        \'hierarchical\'        => true,
        \'rewrite\'             => array( \'slug\' => \'system-type\', \'with_front\' => false ),
        \'show_ui\'             => true,
        \'show_tagcloud\'       => false,
    ));

}



add_action( \'init\', \'wpsites_system_custom_post_type\' );
function wpsites_system_custom_post_type() {

register_post_type( \'system\',
    array(
        \'labels\' => array(
            \'name\'          => __( \'System\', \'wpsites\' ),
            \'singular_name\' => __( \'System\', \'wpsites\' ),
        ),
        \'has_archive\'  => true,
        \'hierarchical\' => true,
        \'menu_icon\'    => \'dashicons-admin-network\',
        \'public\'       => true,
        \'rewrite\'      => array( \'slug\' => \'system\', \'with_front\' => false ),
        \'supports\'     => array( \'title\', \'editor\', \'author\', \'thumbnail\', \'excerpt\', \'trackbacks\', \'custom-fields\', \'revisions\', \'page-attributes\' ),
        \'taxonomies\'   => array( \'system-type\' ),

    ));

}