Just returned from Hanzhong Tiankeng, help one if you can

Location: Hanzhong Ningqiang County can be self-driving or high-speed rail to Ningqiang South Station, from Ningqiang South Station to the starting point, about 2 hours drive temperature: Hanzhong climate is worthy of the southern style near Sichuan, all are chemical attacks, my friend and I set off from Xi'an wearing only a single layer of assault pants, because Ningqiang County is a mountainous area, it is very cold in the morning and evening, it is recommended to wear more. About the journey: Because the village does not allow to walk through the route, the villagers took us to the gate of hell and then turned back, a total of 8km, climbing less than 500, because the scenic area is being built, the steps have been paved, climbing is mainly climbing steps, it is recommended to prepare knee pads About the guide: In fact, from the start to the Tiankeng mouth (i.e. cover) do not need a guide, but from the pit mouth to go inside the cave, must ask for a guide, inside is dark, and there are many forked holes, need someone to lead. Otherwise it is very difficult to get out. The guide we were after the high-speed rail station, the driver helped to contact, 150/person (including the village's toll, you know) About the cave: At first, my friend and I did not plan to go in, but then found it very fun after going in. First of all, the road is not very difficult to walk, can see the most primitive stalactites and water-shaped stones (not the kind of messy lights in Zhashui cave), secondly, there are many undercurrents, wading is very fun (here thanks to the guide sister to bring rain boots, did not expect to be better than lowa) Recommend our driver, people are very talkative and arranged very properly, send us up the mountain waiting for us down the mountain, help contact the guide also took us to eat breakfast lunch. If you need, you can contact me in the background~ Finally, remind: 1. Friends with cameras must bring cameras, the hole is really suitable for taking pictures, must believe in the aesthetics of National Geographic haha 2. Please take your own garbage, traceless mountains and wild 3. The best light time is around 1 o'clock, if you want to take pictures at the hole, you can pay attention to the time