From NTDTV video on Youtube, of Shen Yun Performance, October 2006, by Qi XiaoChun-
Sometimes known in the West as the “Chinese violin” or “Chinese two-string fiddle,” Erhu is a two-stringed bowed musical instrument, used as a solo instrument as well as in small ensembles and large orchestras.
The Erhu consists of a long vertical stick-like neck, at the top of which are two large tuning pegs, and at the bottom is a small resonator body (sound box) which is covered with python skin on the front (playing) end. Two strings are attached from the pegs to the base, and a small loop of string (qian jin) placed around the neck and strings acting as a nut pulls the strings towards the skin, holding a small wooden bridge in place. (wikipedia)