在wordpress函数文件中添加以下代码并进行检查。

add_filter(\'query_vars\', function( $vars ){
    $vars[] = \'parent\'; 
    return $vars;
});

function archive_rewrite_rules() {
    add_rewrite_rule(
    \'^(.*)/(.*)/?$\',
    \'index.php?post_type=client&name=$matches[1]&parent=$matches[2]\',
    \'top\'
    );

    add_rewrite_rule(
    \'^(.*)/?$\',
    \'index.php?post_type=client&name=$matches[1]\',
    \'top\'
    );
    //flush_rewrite_rules(); // use only once
}

add_action( \'init\', \'archive_rewrite_rules\' );