It was previously thought that the Gelao people only had a spoken language, not a written one. However, in September 2008, "The History of Jiu Tian Da Ling" ("English: Record of the Nine Heavens") was found in Guizhou. The book is kept by a Gelao person with a surname of Li in Qianbei, whose ancestors were from the Song Dynasty. A descendant of King Li Wentong of Gulao, he himself does not know what kind of book this is, but he has always inherited his ancestral teachings and regards this book as a treasure. The discovery of "Record of the Nine Heavens" fully proved that the Gelao people is an ancient people with a long history and splendid culture. It not only has a written language, but it was also the earliest nation that advocated the concept of "harmony and harmony." The inventors of tea, fireworks, copper, iron, etc., also proved that the Gelao tribe had their own words.