Alina,It's good to hear from you again.
On the whole we have a good trip and all members are thankful for the experience. We visited a lot of interesting places. And extensive use of high speed trains make travelling comfortable and enjoyable.
I would, however, suggest the following improvements:
1) Better hotel in Xining. Quality of service in that hotel was very good, but the bathroom was not so good.
2) Dinner on first night in Dunhuang was bland tastes and poor choices of dishes.
Other than these unpleasant encounters, the trip was a great trip, and many team members said they will highly recommend your agency to friends who are interested in travelling in China.
Best Regards
Kwarn KE