我首先通过wp\\u set\\u object\\u terms设置要发布的术语，然后在term\\u分类表中运行更新查询，并将第二个术语的父id设置为第一个术语。

$taxo = wp_set_object_terms( $news_arr[0], utf8_encode($news_arr[2]), \'vehicle_models\', $append = false ) ;
$child = wp_set_object_terms( $news_arr[0], utf8_encode($news_arr[3]), \'vehicle_models\', $append = true ) ;
$category_parent    = get_term_by(\'name\', $news_arr[2], \'vehicle_models\');
                    $category_child     = get_term_by(\'name\', $news_arr[3], \'vehicle_models\');
                    $category_parent_id = $category_parent->term_id;
                    $category_child_id  = $category_child->term_id;
                    $wpdb->update( 
                    $wpdb->prefix.\'term_taxonomy\', 
                    array( 
                        \'parent\' => $category_parent_id,


                ), 
                array( \'term_id\' => $category_child_id ) 

            );