Wangdu, also known as Huangni Drum, Long Drum and Horizontal Drum. The Yao ethnic group is a mixed percussion instrument. It is popular in Liannan Yao Autonomous County of Guangdong Province and other places.
The drum body is made of a whole section of paulownia wood and fir wood, and the two ends are covered with goat skin, yellow skin or dog skin. For double pulling, put seven small bamboo tubes into two adjacent ropes respectively, and move the small bamboo tubes to adjust the tension of the drum skin.

Wangdu is in the shape of a long cylinder, and its shape is somewhat similar to the Gonghuang mud drum of the Yao ethnic group in Jinxiu'ao. The total length is 90 cm, the middle part of the drum body is slightly thinner, and the two ends are slightly thicker. One end is trumpet-shaped with a diameter of 22 cm, and the other end is bowl-shaped with a diameter of 19 cm. The outer surface of the drum body is painted with red lacquer and painted with golden ethnic patterns.