Hi, I am interested in the 15-day China Tibet Impression Tour and have some questions which I hope you could answer: 1. in which country is this company based? 2. I am a single traveller. Is this a group tour? 3. Are there any additional costs for single occupancy rooms? If yes what is the amount? 4. In the eventuality I arrive to Shanghai 2 days before the start of the tour, would you be able to arrange the accommodation for me? What would be the total cost of the tour?5. Do.i need to have China visa tourist visa ?