Chinese SKS Drum ID(now w/ pics)(56k?)

I just took a look at my chinese sks drum to test fit on my yugo. it fits very snug and dry functions, but I dont know muchabout it since no one has any info on them. it has the triangle with a 36 in it and thats it. I was wondering if this was a military surplus drum or if it was a chinese made import drum for commercial sales. If anyone has more info, please chime in. I should have pics up by tomorrow.
http://i223.photobucket.com/albums/dd12/euroking99/P1020283.jpg
http://i223.photobucket.com/albums/dd12/euroking99/P1020284.jpg
http://i223.photobucket.com/albums/dd12/euroking99/P1020285.jpg
http://i223.photobucket.com/albums/dd12/euroking99/P1020286.jpg
http://i223.photobucket.com/albums/dd12/euroking99/P1020289.jpg
http://i223.photobucket.com/albums/dd12/euroking99/P1020290.jpg

I have one too. same markings. If I remember right they came in the country right before the clinton ban and not many got in.

Mine has a broken spring, if you know where I can get a replacement

Updated with pics. These are the pics from the 100rd chinese sks drum. I maybe selling it if the price is right, maybe even trade for something.