I see,I think this map was built in 3dsmax,See here
http://bbs.hxsd.com.cn/post/view?bid=144&id=6101491&sty=1&tpg=1&age=30
And he says:"This map was based on a ture sence.Im a wargame fan,This is the place that we played wargame.Bullets incomeing from everywhere so teamwork is important;The map is big enough for AWP but watch your ass carefully.There are bugs in the map,All doors are open because I dont know how to make it roll.No 3dskybox,No water,No wires and many physics property..."