Hi i am Dr.Rakesh from Nepal going to Maldives, 45hr transit in Guangzhou

I am a Nepalese Citizen. I am traveling to Maldives and I have a 44 hour transit in Guangzhou,
My questions are:
1. Do i have to stay in Airport for 44hr? or my
airline will arrange me a hotel (China
Southern Airlines)?
2. If i choose to stay outside Airport, How far
inside the city i can travel to?
3. Will i get 44 hour transit visa? Or its just,
24hr visa?
4. If its just 24 hour visa what should i do for
remaining 20 hours??

P. S
I was a former student in china and have stayed there for 6 years.