I'm sorry, I couldn't find any results for the song "西北雨幻想曲（双笛+民族乐团）" in my web search. It seems that this song is not very popular or well-known. Maybe you can try to search for it on some other platforms, such as YouTube or Spotify. Or maybe you can tell me more about this song, such as who is the singer, composer, or lyricist, and when and where it was released. I might be able to find more information for you then. ?