Möng Nai or Mongnai is a town in Mong Nai Township in the Shan State of Burma. Mong is equivalent to Mueang. Prior to World War II, Mongnai State was one of the largest and the most important of the States in the Eastern subdivision of the Southern Shan States. The early history of Mong Nai State is buried in obscurity. The town has been several tim…Möng Nai or Mongnai is a town in Mong Nai Township in the Shan State of Burma. Mong is equivalent to Mueang. Prior to World War II, Mongnai State was one of the largest and the most important of the States in the Eastern subdivision of the Southern Shan States. The early history of Mong Nai State is buried in obscurity. The town has been several times burnt, as it has always been the centre of disturbances in the Southern Shan States, and all records have perished in the various fires.