This is getting too serious, it is time for some mandarin pop.
This song, 嘻唰唰, while (intentionally) silly, is quite catchy, and it was a big hit in China. It has also been at the center of a controversy: the band has been accused of plagiarizing the song from an older Japanese pop hit. It really makes you think: to write a song like this you have to plagiarize it? It is like the story of the worst referee report ever.
The paper presents a wrong proof of a known result. The mistake, however, is not new.