Sorry for my delay review on the internet, because my family just come back from Mongolia trip.
We are very happy and enjoyable for the 8 days trip with chinatour.net.
The arrangements worked perfectly. Happy, Joy and Sophia are our guide had already contacted the hotel by the time we checked in and showed up on time the following morning. They proved to be an entertaining, knowledgeable and extremely pleasant companion for the day.
We took the overnight trains between Beijing/Xian/Shanghai, and the soft sleeper is good, and there are 4 beds in the cabin, but if your time enough, you may try to take faster bullet train.
In a word, we are highly recommend chinatour.net as your travel agency in China.