First of all, I visited China once before in 2012. I attempted to go to Tibet but I was unable to obtain a permit because there was some unrest in the country at the time. Should I avoid mentioning that I had a Chinese visa in the past on the application? Would they have a record of me applying for a Tibet permit and possibly deny me? I may be paranoid about this but I don't want to get rejected a second time.
One of the requirements is a round trip air ticket. But we are leaving Tibet overland so don't have a outbound ticket. I do have an invitation letter from my tour company with a fake itinerary which says they will be arranging my flights and hotels. Will this be enough?