If you are looking for a nice tour guide in Zhangjiajie, China, I will definitely recomend Venus. She was our tour guide for 1 day in Zhangjiajie while me and my family staid for one night right there. It was a pity because we would like to have more time to visit different turistic places that she recommended us.
However, we really enjoyed our trip thanks to Venus, who also did us different favors as calling our hotel to keep our bookings, she gave us other tour to the glass bridge which wasn't planned but Venus did everything possible to get our tickets on time. As well, she took us to the Tianmen Mountain that was a very wonderful tour with lunch included, and finally she tooks us to the airport. In general we got our best service with her because she was our tour guide, transport and translator because must people there do not speak or understand English.
So, in case you may travel there, do not hesitate on contacting her at +86 13487449439. You will love her!!!
I will surely come back and visit the other missing places there ;)