Zhangu, or war drum, is a Chinese musical instrument. It is similar to the Tanggu in appearance, but is lower in pitch. Also known as the Biangu . it was an instrument used in ritual music and also popular with traditional wedding bands.
Zhangu has many different sizes according to its functions, generally, the diameter of the drumhead are 270mm, 330mm, 400mm, 46mm and 54mm and the height of the drum are usually 170mm, 200mm, 240mm, 300mm and 340mm. The drumhead is usually made of wood and leather; there are 2 to 4 metal rings at the waist of the drum. The player uses one or two sticks to play the drum. The Zhangu needs two men when played in the army march, with one man carrying the drum on his back and the other playing behind the first man.