http://www.czechfilmorchestra.com/CFO_audio.htmAR Rahman says in this news article,
My previous film was Warriors of Heaven and Earth. This is a Chinese film. I had to fly between Chennai and London to complete the film's re-recording. Chinese people like Mohana raaga. I had composed most of the tunes based on this raga and on Sindhu Bhairavi. They loved the tunes, he said.
Interesting. Some googling ensued & revealed the following information about Mohana from this site.
Gamakas for all swaras. Found in Chinese, Japanese and Swedish music
http://minorscale.net/?p=11