自定义重写固定链接不起作用

function create_posttype() {
    register_post_type( \'events\',
        array(
            \'labels\' => array(
                \'name\' => __( \'Events\' ),
                \'singular_name\' => __( \'Event\' )
            ),
            \'public\' => true,
            \'has_archive\' => true,
            \'rewrite\' => array(\'slug\' => \'%city%/events\'),
        )
    );
}
add_action( \'init\', \'create_posttype\' );

register_taxonomy(\'cities\', array(\'events\'), array(
    \'hierarchical\' => true,
    \'labels\' => $labels,
    \'show_ui\' => true,
    \'show_admin_column\' => true,
    \'query_var\' => true,
    \'rewrite\' => array( \'slug\' => \'city\' ),
  ));

function wpa_permalinks( $post_link, $post ){
    if ( is_object( $post ) && $post->post_type == \'events\' ){
        $terms = wp_get_object_terms( $post->ID, \'cities\' );
        if( $terms ){
            return str_replace( \'%city%\' , $terms[0]->slug , $post_link );
        }
    }
    return $post_link;
}
add_filter( \'post_type_link\', \'wpa_permalinks\', 1, 2 );

permalink结构正确（例如。http://www.example.org/new-york/events/event-name) 但我有两个问题：

模板单一事件。php未显示，显示404http://www.example.org/new-york/events 应显示存档

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