protected function convertSurname($string, $dictLoader)
    {
        $dictLoader->mapSurname(function ($dictionary) use (&$string) {
            foreach ($dictionary as $surname => $pinyin) {
                if (0 === strpos($string, $surname)) {
                    $string = $pinyin.mb_substr($string, mb_strlen($surname, 'UTF-8'), mb_strlen($string, 'UTF-8') - 1, 'UTF-8');

                    break;
                }
            }
        });

        return $string;
    }