Originally thought Baibiyan is similar to other caves in Bama. When we arrived at Baibiyan Scenic Spot, we were attracted by the green hills and waters like Jasper here. We were very excited to see where the magic of Baibiyan is. The cruise ship carried us into a thousand-year-old karst cave in the rippling green water. We passed through the three caves where we could not see our fingers. The guide said that we had experienced three days and three nights. In the middle of the cave, for a time, there were six days in the world. Experience three darkness and three light, as if shuttling through the tunnel of time to fairyland. The content of negative oxygen ions in the underground river is as high as 50,000. We breathe pure oxygen deeply. It feels as if we breathe deeply into the lungs. What a luxury it is to breathe like this! Water is as pure as fairy dew, and our dearest little elf's younger sister often takes a sip in her little hand, which is as clear as ever. How can one not live long if one's mind is empty and merged into nature? No wonder Bama deserves to be the longevity home of the world.