transit in Guangzhou airport with two different international flight and claim baggage.

please advise, I am Saudi, will arrive in the airport with Saudia airlines and continue to Seoul (ICN) (3 hrs layover in airport) but since it is two different flight the luggage will not be transferred automatically to final destination. if I need to claim the luggage and recheck in with china southern airlines. do I need a VISA?
does china southern airline has a counter in the transit area so I can get the boarding pass from them?
I have seen in some airports that when I check-in in the transfer desk they transfer my luggage without interference from me.