The song was released on May 1, 1999.

According to a query on NetEase Cloud Music, we learned that the song is called "Outside the Window" and is sung by singer Li Chen. The lyrics and music are written by Niu Chaoyang. It was included in the album "Outside the Window" on May 1, 1999.

Excerpts from the lyrics: Tonight I came to your window again. Your shadow on the curtain is so cute. I have loved you quietly for so many years. I will leave tomorrow.