Thai citizen transfer in PEK to Russia.

My flight will arrive in Pek on 21.30 LTC. My connecting flight to Russia on 02.35 am. by S7 airlines. Do I need visa to China ? My baggage check through from HKT-PEK only. Then I have to collect my bag and check in again in T3 . So, I am worry about entry to China even I am tranfer or transit passenger.

And In PEK has tranfer area for passenger without visa? And no visa can collect baggage there ?