Note: this post has a lot of dead links which have to be up-dated.
Yue Ye (moon night, Yuè Yè 月夜) is a composition for the erhu by Liu Tianhua (Liú Tiānhuá 刘天华). The date given on the score is 1924, I assume this is the year of publication.
Here are 4 different recording of the piece. All are erhu only, which I prefer. It seems many if not most recordings have accompiment, ranging from just with yangqin to a small ensemble to the large modern Chinese orchestra.
This is my favourite of these four. The erhu tone is big, rich and full-bodied.
Liu Changfu 刘长福
This one is more reflective, less intense, with a sweeter and gently beautiful tone.
The first thing that strikes me about this recording is that the player is playing the piece like a violin player.
This recording is noticeably slower than the other ones here. The erhu is tuned one semitone lower than the standard tuning (assuming A = 440hz), to D flat and A flat. So I wonder if it has been slowed down. All the other tracks on the CD this recording is from have the same open string tuning.
This is from a 1982 cassette released by the China Records Company(HL 113).