It was the main town of one of the
Shan States,
Monghsu, known in ancient times as Hansawadi. In early 1990s, there is a major discovery rubies near Mong Hsu. Within a few years, Mong Hsu rubies constituted over 95% of faceted rubies entering world market; however, they require considerable sophisticated treatment. In 2022, Mong Hsu Township and its western neighbour
Kyethi Township were split off from
Loilen District to form the new
Mong Hsu District for which Mong Hsu became the capital. ==References==