Norinco is a marketing front-company, North China Industries, for PLA aresenals/govt-run factories. It all happens with a nod from the gov't there.
They "brand" any/everything the govt wants to sell overseas to raise cash; surplused SKSs that the PLA has replaced with AKMs, semi-auto AKMs the gov't wants to sell to foreign civilians, semi "M14" rifles, 1911 pistols, ammo, shotguns, .22LR rifles.
We could be burning thru piles of CHICOM 7.62x39 if it was still allowed to be imported.
Your SKS is every bit the same as the no-name CHICOM SKS you will find or the Keng's Firearms "branded" SKS I used to have. Speaking of which, you can find Norinco branded AKMs out of the same arsenal as no-names and PolyTechs.