Li Lao drum
The Li-Lao bronze drums or Heger type II drums are a type of ancient bronze drums found in Southern China and Northern Vietnam invented and used by Tai-Kadai-speaking (or specifically Tai-speaking) ethnic groups who were known to Chinese as Lǐ (俚) or Lǎo (獠) and who historically inhabited the area between the Red River Delta and the Pearl River Delta from the 3rd to 8th century AD and later the Muong people, an ethnic minority in Northern Vietnam, from the 10th to 12th century. Classified by Franz Heger as type II to distinguish with the Dian-Dong Son drums or Heger type I, the Karen drum or Heger type III. Li-Lao drums were found in Guangdong, Guangxi, and northern Vietnam, particularly in the Muong hills.