The gong (pinyin: máng luó) is also known as the winter gong. In the Yunnan Dai folk song "Heaven on Earth", it is described as follows: "The Dai family gathered on the banks of the Lancang River, and the gongs were beating loudly." In "Selected Chinese Folk Tales: The Little Carpenter", there is also a "he turned angrily." Back at the palace, I banged countless gongs."
Because the umbilical protrusion of gongs is milky (hemispherical), it is also known as milk gongs, milk gongs, and bag gongs. It is a percussion instrument of ethnic minorities in Yunnan.
It is made of copper, the body is round and flat, and the shape is the same as that of ordinary gongs, but there are protruding nipples. When struck with a mallet, it is round and low, and the tone is unique.
It is mainly popular among the Dai, Benglong and Jingpo peoples. It is often composed of four or five sides in a group of different sizes, which are hung on a stand and played.