This is Legong.

This is Legong. It’s a form of Balinese Dance. Originated in 19th Century for Royal Entertainment.
It’s a dance form that is characterised by detailed finger movements, complicated footwork and amazing facial expressions.
These dancers start training at the age of 5 and are regarded highly in the society. They usually become wives of royals or rich merchants.
In present these dancers may be of any age. Performances by men in women attire is also quite common.