What is the origin of the Qin Shi Huang theme music in Civilization IV?

I've been trying to identify the music that is heard while one talks diplomacy with Qin Shi Huang in Civilization IV. The melody has been stuck in my head for a while now, and I'd like to know what it is I keep whistling.

Sadly, it's not listed on the Wikipedia article about music in Civilization IV.

Since I have not played any other games in the series, it is entirely possible the theme is a remake of music from an older game in the Civilization series.

Does anyone know more about this music theme?

For reference: I'm talking about this song:

Solution 1:

It is an arrangement of the title theme to the Super NES conversion of the original Civilisation.

If this link doesn't work I'm sure you can find it

Solution 2:

I believe thats an original track for civilization 4. It's not based on an existing song as I didn't find any references to any track on album. But to be sure I would simply send an email to the game support team and I think they could confirm this.

As for the music the game already has you could just download that youtube video and extract the sound. Alternatively, if you want I can get the game from a friend and try to locate/rip the track for you.

However, I think you can find music similar to the this one easily. Just search for Chinese classical music on youtube.