I haven't answered you earlier because we were travelling in western Sichuan and had no internet.
We very much enjoyed our Silk Road Tour in the north west, and were impressed with our guides, both very dedicated and pleasant people. Our only negative comment would be about the hotel in Urumqi, a very run down Ramada hotel, where the bedsprings made it impossible to sleep well, as well as other defects. The Silk Road hotel in Dunhuang is lovely.
Thank you again for your services.