Liye Warring States Site1May, 982, a group of farmers in Liye Town, Wuling Mountain, Hunan Province dug up a large number of ancient pottery fragments, stone knives and axes from the soil, so they quickly reported them to the Cultural Relics Bureau, which quickly sent people to explore the site and found that it was the remains of an ancient city during the Warring States Period. Because of the age, archaeologists didn't find many valuable cultural relics in this relic at that time, so they gradually shelved the matter until 2002, when a hydropower station was to be built here, so the Cultural Relics Bureau conducted a thorough excavation work here.
Fire-breathing ancient wells, but this excavation has made amazing discoveries. They found a huge square ancient well in the ruins. There is no water in the well, but it is covered with thick soil and moss. A strange scene appeared when they cleaned up the moss and mud. First, they smelled a strange smell, some of which smelled like rotten plants, and then a light blue flame came out of the wellhead, which scared everyone. They hurried back, and soon the flames died out. They made a detailed investigation of the well.
The cause of the fire is that there are many leaves and weeds under this ancient well. After the wellhead was closed, after more than 2000 years, these weeds and leaves have already turned into biogas. When the wellhead is opened, methane is ejected from the wellhead, and it is easy to form a flame when it contacts dry air. After the biogas was discharged, archaeologists went down to the bottom of the well to search, but unexpectedly dug up more than 30 thousand bamboo slips of the Qin Dynasty under the mud cover of the bottom of the well, which recorded a large number of local files of the Qin Dynasty and even the earliest multiplication formula table in the world.