Hồ dynasty
During the seven years of the Hồ dynasty (1400–07) Classical Chinese was discouraged in favor of vernacular Vietnamese written in Nôm, which became the official script. The emperor Hồ Quý Ly even ordered the translation of the Book of Documents into Nôm and pushed for reinterpretation of Confucian thoughts in his book "Minh đạo". These efforts were reversed with the fall of the Hồ and Chinese conquest of 1407, lasting twenty years, during which use of the vernacular language and demotic script were suppressed.