Wildflowers: Sarawak red flower identification

The flower here was shot at the Annah Rais Hot Springs in Sarawak, North Borneo in late May 2014.

Can you please help me identify it?

Thank you.

 

A double cultivar of Hibiscus rosa-sinensis.

 

Thank you. That means it is a Bunga Raya, which when red is the Malaysian national flower (it is on the Malaysian currency, the ringgit). I wasn't at all sure of this. Thank you for the identification.