Help - Cantonese song in American film

Hi all, there is a (I'm assuming) Cantonese version of Fur Elise in The Gentlemen, and I was wondering whether there is anyone who would be able to help me find it. Youtube link to the clip where the song is played:

https://www.youtube.com/watch?v=0FOkrqJhZQc

Thank you!

Danny Chan was pure hits. Play the first few notes of his songs and countless people will be able to sing his songs, word for word.

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