DXB to LAX with connection in PEK and 23 Hr Layover

Hi, I am travelling from Dubai to LAX in November with Air China. Flight connects in PEK with a 23 Hr Layover. I am applying for Chinese Visa and will like to leave airport and check in a hotel as my flight is scheduled to arrive in China PEK at 12.55 pm and leave on 12.00 noon next day. Can you advise me how the arrangements to be made. I will be arriving and departing at Terminal 2 PEK. Will I be allowed to leave the airport, will I have to collect luggage and re-check in, and finally how much time is will I need for checking in at PEK.

Thanks.

Al