I've read Jin Yong's other works such as The Return of the Condor Heroes. Yes, I think it is a good material to study Mandarin. For example, at the beginning of the video, Xiaozhao said: 我叫小昭。 wǒ jiào xiǎo zhāo" I am called Xiaozhao 我听小姐叫你'无忌哥哥', wǒ tīng xiǎo jiě jiào nǐ ' wú jì gē ge ', I heard that Miss called you "Elder brother Wuji" 你大名是无忌吗？ nǐ dà míng shì wú jì ma ？ Is you formal personal name Wuji?