Excellent and polite service.
I had an excellent experience with travel china guide. I booked lots of trains and various entrance tickets. I dealt with Christina Zhao, who was always very polite and patient as my plans changed several times. The train tickets are only released a few days before and she always managed to get my train of choice, with one exception, but the next one was only something like 15 minutes later. She managed to get all the entrance tickets. In many cases, unbeknownst to me and her, it wasn't necessary to prebook as there weren't huge queues, but I think for the Forbidden City it was probably essential, not that there was an enormous queue for tickets as most of the Chinese tourists must have prebooked and just entered with their Id cards, but because they only allow a certain number of people in a day. Anyway, as I say, totally satisfied, and I wouldn't hesitate to contact them again the next time I'm in China.