HTML Unicode ampersand-encoding

[Neptilo]

I would like to convert a QString containing Unicode characters to plain HTML text. For instance "私" would become "&" followed by "#31169;" (couldn't display it in a single string).
Is there such a functionality in Qt? I found the function QString Qt::escape ( const QString & plain ) but it only converts HTML metacharacters <, >, &, and ".

Waiting for a better way, I tried to write my own encoding function:

QString ampersand_encode(const QString& str){
 
    QString chr;
    QStringList list = QStringList();
 
    for (int i = 0; i < str.size(); ++i) {
        chr = QString(str[i]);
        list << "&#x" + QString(chr.toUtf8().toHex()) + ";";
    }
 
    return list.join("");
}

QString ampersand_encode(const QString& str){

    QString chr;
    QStringList list = QStringList();

    for (int i = 0; i < str.size(); ++i) {
        chr = QString(str[i]);
        list << "&#x" + QString(chr.toUtf8().toHex()) + ";";
    }

    return list.join("");
}

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It almost works. It works for ASCII characters but when I try it with other Unicode characters I only get Korean characters. Why? I feel there's not much to change but I don't know what. Also, any improvement of my code would be appreciated.