My visa is expired. I’m in china. Can I get another visa?

Hello.

I’m in china now. My entry permit is expired. I have 10 days to leave the country. I will go back to canada. I will ask for another one. Will they accept my new one? What are the reason they can reject it?

I had 5 entry permit for china before and I always do things on time. I never did something wrong. I always left on time.