Wikipedia
The Baiyue, Hundred Yue or Yue were various partly or un- Sinicized peoples who inhabited South China and northern Vietnam between the first millennium BC and the first millennium AD. In the Warring States period, the word "Yue" referred to the State of Yue in Zhejiang. The later kingdoms of Minyue in Fujian and Nanyue in Guangdong are both considered Yue states. Although Yue people had knowledge of agriculture and the technology of shipbuilding, Chinese writers depicted the Yue as barbarians who had tattoos, lived in primitive conditions, and lacked such technology as bows, arrows, horses and chariots.
The Yue were assimilated or displaced as Chinese civilization expanded into southern China in the first half of the first millennium AD. Many southern varieties of Chinese bear traces of substrate languages originally spoken by the Yue. Variations of the name are still used in the name of Vietnam, in Zhejiang-related names including Yue Opera, and in the abbreviation for Guangdong.