Hi. I have a stop over of 22hrs in Beijing airport. I’s it possible to leave the airport and stay at

Yes, you are allowed to do that, but you should book a hotel in advance and print out a confirmation of your accommodation booking (just a simple printout of your accommodation from Booking.com or similar). Upon your arrival in Beijing, you will approach 24 hour visa free transit counter where you will present your flight tickets and your accommodation booking confirmation. Shortly after, you will be allowed to exit the airport without a visa.