@NxtChoice: Better remove the protective screen from the case plates, so it actually becomes transparent 
Thank you. As it arrived, I assembled it and found it's not so transparent as PMMA. I thought it a little strange, and until last Saturday I found there is protective film cover
I will take some pictures and then update it when I return back home.BTW, why I can't link dropbox images here? So I now link the images from weibo.com .