Can I leave the airport for couple of hours if I'm a transit passenger from Russia travelling to Aus

I'm from Russia. I travel to Melbourne via Beijing. I arrive to Beijing at 07.15 a.m. on the 18th of June. My flight to Melbourne is at 01.05 a.m. the next day. So I have about 18 hours before that flight and I'd like to stay at the hotel outside the airport to sleep and relax. Can I do it as a transfer passenger after I get a 72-hour visa-free transit?
Thank you!