Hokkien was once regarded as an official language during the Tang Dynasty. During the Tang Dynasty, the southern Fujian region became a settlement of immigrants from the Central Plains, most of whom came from Henan and Shaanxi, and they spoke the language of the Central Plains. As these immigrants lived in the Hokkien region for a long time, the Central Plains dialect they spoke gradually evolved into a unique language, Hokkien. During the Tang Dynasty, Hokkien was widely used in official settings and literary works.
However, the official language of the Tang Dynasty at that time was the Central Plains dialect, not the Hokkien dialect. During the Song Dynasty, Hokkien was further developed and popularized, and was established as one of the official languages of the administrative division of "Fujian Road" by the Song Dynasty. During the Yuan Dynasty, the Mongols invaded the Central Plains and forcibly relocated the people of the Central Plains to the southern regions, and these immigrants also brought their language to the south, thus further promoting the formation and development of the Hokkien language. By the time of the Ming Dynasty, Hokkien gradually became one of the official languages of Fujian.
Therefore, it can be said that Hokkien is the official language of the Tang Dynasty and has been formed through the evolution and development of many historical periods. Tang Dynasty