What is the most famous and popular dance of Mongolians?

The most famous and popular Mongolian traditional dances are Diane Dance, Cup Dance, Chopsticks Dance, Sabre Dance and Erdos Dance. Here are two.

Chopsticks dance: mostly solo dance for men. Dancers hold a pair of chopsticks in their right hand, hitting hands, shoulders, waist, legs and other parts, sometimes rotating, sometimes kneeling on the ground, hitting the ground, and the rhythm changes from slow to fast. Accompaniment instruments include Sanxian, Hu Si, dulcimer and flute. There are also group dances performed by men and women

Flag dance: also known as big flag, it is popular in Ordos grassland in Inner Mongolia. The dancer holds two small wine glasses in each hand. With the rhythm of the music, each beat hits the small wine glasses, making sounds such as fast, slow, broken and shaking. Legs have kneeling posture, circuitous steps and other actions. Dancers stand up, dance with their hands touching the cup, and step back and forth with their feet, forming an elegant and graceful dance of "dancing, twisting their waist and following their eyes, and walking steadily". Accompaniment instruments include Sanxian, dulcimer, Hu Si, flute, etc. The tune adopts local popular folk songs. Sometimes there are bowls and lights on your head.