Liu Yu, a national border guard.
He was at the border of his motherland, and every lonely and cold night, he could hear a beautiful singing voice that overlapped with the singing voice of the girl in his memory.
Later, he discovered that it was a fish singing.
He didn't know until his death that the fish was the incarnation of the girl she longed for.
Later, the border guards called this singing fish Sound Fish.
After Liu Yu died, he was all alone. All he brought to his grave was a photo of a stunning girl, with three words written behind the photo - Lin Cheyin.
Conception: