Students must bring their student ID card, because they will be half price (old age certificate and children of 1.4 meters will have discounts). If there is no discount, it still feels a bit expensive. People with weak constitution must bring a coat. The nine-day hole is colder, and the temperature difference between the hole and the hole is relatively large. Don't believe that the photos in the Jiutiandong will be free, the super small photos will be free for you, and the big photos will be charged (do not want photos, it is best not to take pictures). The cave is relatively long, you can see it in an hour and a half, there are more small attractions inside, some will be more amazing. With the lights, beautiful.