Brakes on the QingQi 200 GY

I apologize if this question has been covered already but I cannot find it . I am stocking up for a road trip on my QingQi and will be heavily loaded and travelling in mountainous regions for a few thousand km so I am sure to need to replace my brakes at some point.

This bike had front disc- brake and a rear drum-brake. What brakes pads should I get? The brake pads on taobao are so cheap (5-10 RMB), I can't believe that it's as simple as that. What about the drum brake, how does that work? I can't see any pads in the parts manual.

http://item.taobao.com/item.htm?id=10281503060

meh... here's a photo of my brake pads after 11,000 km .. seems they still have 5k to go..

http://hotimg23.fotki.com/a/113_106/186_20/P1070024.jpg

http://hotimg23.fotki.com/a/113_106/186_20/P1070031.jpg

That's for the front. The rear a rarely use. But I have disc brakes on both rear and front..But still it's a good idea to have spare brake pads, at least for the front. Brake pads wear out very quickly if riding in muddy conditions for extensive periods of time.

thanks to both of you. Are those pads just cheapy ones?