The erxian (二弦, “two-strings”) is usually the lead instrument and other core instruments include the touxian (頭弦, “head-lute”), zhuxian (竹弦, “bamboo-lute”), tihu (提胡, popularly known as erhu [二胡, “two-stringed fiddle”]), yehu (椰胡, “coconut-shell fiddle”), pipa lute, sanxian and yangqin (洋琴, a hammered metal-string zither). It is sometimes completed by percussions such as muban (木板, hand-held wooden clapper), daban (大板, hollow wooden blocks), muyu (木魚, woodblock), zhegu (哲鼓, small drum), and tongling (銅鈴, copper bell), as well as a wind instrument like the suona, di (笛, transverse bamboo flute) or xiao (簫, end-blown flute).