Help with identifying SKS

[Flying10uk]

I would say not Chinese because of the bayonet being a flat blade rather than a cruciform bayonet. I don't know that China ever fitted any flat-bladed type bayonets to their SKSs??? There should be enough markings present to give a positive I.D. on the country of origin; it's just a case of finding someone who knows what the markings mean. However, you have come to the right place and give it a few days, you should have an answer. My guess is Russia or Eastern Europe but not China; I stand to be corrected.