In such cold weather, it is more appropriate to go to the hot spring in the cave. There is no need to be blown by cold wind outside, and the water temperature is relatively hot. It is very comfortable and not susceptible to colds. Because of the urgency, there is no mobile phone waterproof bag. So the cell phone didn't come in and no photos were taken. Or Ctrip booking is more reliable, direct to hotels and hot springs fares are more expensive.