T3 hotel in Beijing Airport

Hi. I am flying in to T3 from Russia with S7 then have a 15 hr wait until my next flight. I think I may have to recheck my baggage as the first ticket is a different ticket than the next. Am I able to re check my baggage this early before a flight so I can use the T3 hotel to sleep in. I'm assuming you need your boarding pass for next flight to get to this hotel in the terminal? Thanks