Huur are classified by the shape of their sound boxes and there are basically two kinds: the pear-shaped Hobus and the sleeve-shaped Xiqin .
忽兀尔以音箱形状分类，大致可分为梨形火不思式和筒形奚琴式。
2
Representative mixed plantations A, B of Cyclocarya paliurua Ilinsk and Chinese fir and pure stand of Chinese fir in Xiqin Experimental Forest Farm were selected, and their biomass was determined.