淚的小雨 Tears of rain?

Hello All,

I recently hear what I believe to be a very lovely folk tune called 淚的小雨 Tears of rain. I would love to add it to my playing and looking to purchase the notation.

Does anyone know more about this piece.

Here's and link to it in Facebook.

https://www.facebook.com/100005573538943/videos/457097577819356/?theater

The very best to everyone and Happy New Year from Arizona!