Pakistani Passport and Canadian Permanent Resident Transiting through Beijing

Hi,
I am planning a trip from Canada to Pakistan and there is a 23 hours overnight layover in Beijing. I am a Pakistani Passport holder with valid Canadian Permanent Residence card. Will I be needing a visa to exit out of the airport in Beijing? Air China provides hotel stay for a less than 24 hours transit but I want to know that I will be able to avail that and exit the airport to go for the hotel stay. Please respond. Thanks!