According to "Baidu": Ebony is the common name of Sichuan people for dark wood, and it is not the living black wood on the ground on the African continent. It is a natural mutation of celestial bodies in the ancient Sichuan region 2,000 to 10,000 years ago. Earthquakes, floods, and debris flows buried all ground plants and organisms into low-lying places such as ancient river beds. Some trees buried in the mud are formed through a carbonization process of thousands or even tens of thousands of years under the action of bacteria and other microorganisms under conditions of hypoxia and high pressure, so they are also called "carbonized wood".