I also have an SKS with Chinese heritage; i have had less-than-wonderful results from the two receiver cover scope mounts i have tried. I tried the kind with the rail platform made into the receiver cover and the kind with the set screws & attached rings; neither seemed to stay tight enough for me.
I have not used but have often seen recommended the "choate" mount which is attached to the receiver and a side rail, quick-release setup from kalinka. The side rail setup would require mounting a rail base onto the side of the receiver and can leave the scope fairly high above the receiver cover unless a "molot" mount that lowers the scope a bit is used. Welcome to Kalinka Optics Warehouse!
Choate Choate Scope Mount SKS Steel Blue - MidwayUSA
I have decided that i will try some peep sights next, before i get something permanently attached to my SKS. http://www.tech-sights.com/
Good luck with it!