Thirty years ago, now it's like a park, less primitive and wild, too commercial. The parking fee for self-driving tour is 3 yuan per quarter of an hour, which is reasonable. You don't need a tour guide to play by yourself. There's an interpreter at the door. It's OK to listen to group guides. There are many travel teams along the way. Besides, there are introductory signs in every scenic spot. The tour guide is just a bit of wild history anecdote.