Water at 15℃ is an online buzzword, which refers to the song "Love You at 15℃", which is sung by A Si and is an advertising song. Watson's official said that "15-degree love" is "love beyond the laws of physics".

The second is your 15-degree stalk. In fact, this stalk is not a stalk, but a song "You at 15" that was released in 219. The original singer is A Si. This song is an advertising song for Watson's distilled water.

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some time ago, when this song suddenly caught fire on the internet, some people said that this song was a slobber song, and the singer was just flowing, but as an advertising song, it was necessary to catch fire to better advertise items.

What's more, the meaning of this song itself is good, and it's not a slobber song. As for Chacha, this song was released in 219, and it didn't catch on until two years later.