Not all Norinco's are preban.
IMO buy the best condition you can, buy matching numbers, don't buy stories (bring back, Stalins personal weapon, etc...), don't buy aftermarket parts and keep it original
Not all Norinco's are preban.Couple things to help you out:
If you have a Norinco, it's a preban, no matter what.
If you want to buy a bayonet, check the serial number, if it's above 9,000,000 it's a spike, if it's below 9,000,000 it's bladed.
If you can find it, grab an SKS cleaning kit. They're very useful in cleaning out the bore and the gas tube especially, if it's included, there's a storage compartment for it in the buttstock.
Definitely get it inspected by a gunsmith just in case. It's unlikely to have problems, but it's always good to have it checked out.
Never shoot American made 7.62 ammo, the cases can rupture or slamfire.
If you can find a paratrooper variant, those are always fun, but don't stress yourself looking for one, because they're not too common, and they don't shoot any better than the standard model.
Keep some Hoppes No. 9 handy, alot of milsurp ammo is corrosive and can reek havoc on your bore.
And finally the most important one of all: resist the urge to fire as fast as you can! It will overheat your barrel, and you do NOT want to touch an overheated barrel. I speak from experience on that one.