Ulanbator the capital of Mongolia, was my destination for my visa run from Hohhot. I had got my Mongolian visa at the Mongolian visa office in Hohhot before departing for Erlianhot, on the Chinese side of the border. There I purchased an international train ticket to Jamin Ude, the first town across the border. I stayed on the train by extending my travel to UB by buying another ticket @ Mongolian prices, from JU to UB, much cheaper than buying a ticket from Erlianhot to UB! The Chinese visa office in UB were fast. And there weren't long queues outside. But that was a good few years ago.