Ruili is a county-level city of Dehong Prefecture, in the west of Yunnan province, China. It is a major border crossing between China and Myanmar, with the town of Muse located across the border.

Tai Nuea or Tai Nüa, also called Dehong Tai and Chinese Shan, is one of the languages spoken by the Dai people in China, especially in the Dehong Dai and Jingpo Autonomous Prefecture in the southwest of Yunnan Province. It is closely related to the other Tai languages and could be considered a dialect of Shan. It should not be confused with Tai Lü.