When I went in February, the back mountain had not been developed. This time, the back mountain was developed. There were more attractions and a sightseeing car, but the ticket did not increase the price, or 60. I don't know if the tickets will rise in the future, but I heard that there must be a charge behind the sightseeing car. At present, some attractions are under development. Drive by car to the exit parking lot, then take a sightseeing car up the mountain to the entrance of the back mountain. After entering the scenic spot, the whole journey is basically down the mountain, through the cave, down to the mountain pier, then take the boat through the dark river, to another pier, and then walk from the exit, single distance, no turning back, Two hours is enough.