There are many farms along the way, don't worry about food, but if you want to go up the mountain, I suggest you take water and bread, because you don't want to go down the mountain to eat, climb halfway and then go up the mountain.

When going down the mountain, you can ride down the mountain for free with your ticket. When I went there last year, the 9999 finish line there was not ready. I wonder if it's all right now. If it's not done, just go directly to level 4000 or so. The Tianchi Lake there is very beautiful, and there is nothing to see on it. If it is completed, of course, it depends on what the finish line looks like. I hope you have a good holiday!