I am currently on a working visa in mongolia and require a visa to visit china with my family

My wife, son and family will be visiting Mongolia in late november, then we are hoping to go to China in dec for a week from the 2nd .
I will be in UB this friday, and then saturday will be going to Oui Tolgi.
Is it possible to meet to discuss my visa to visit china, I can fill in the application.
My issue is I have a criminal record and this may need to be discussed. Let me know if I need to bring any information. Or do I just process the application?
I will have 8 days free for interviews etc. from 26th November.
Appreciate any advise.