We will go to Zhangjiajie with a group tour and stay 2 nights there .

Unfortunately the tour program not visiting Tianment mountain. And my plan if Is it possible to separate from the group and go to with local guide/tour ( who can speak English/Melayu ) only 1 day special to visit Tianment mountain with the glass sky walk. And after that I will join again with my group tour and continue the next program. To whom I must contact and how much estimation the cost/person ?