Dear Jesper Lindberg,
Thanks for contacting
Top China Travel!
As far as I know, there is no direct coach from Nanchang to Shiniuzhai Scenic Area. It is suggested to rent a car with driver to take you there, or you may join in local day tours or two-day tours from Nanchang to Shiniuzhai, which include transport from Nanchang to Shiniuzhai and acommodation in Shiniuzhai. Or you can rent a car through local travel agent in Nanchang to get there.
The entrance fee of Shiniuzhai Scenic Spot is RMB 118 per person, and the opening hours is 8:00am-6:00pm daily.
Any further request or question, please feel free to contact with us.