《新唐书·列传·卷一百五十》
唐官三品以上的都罢职，四品以下的留用不动，并陈列符命，取 广明 二字，解释说： 唐 字去掉 肀 、 口 而加上 黄 ，就是 广 字，明白告知黄该代唐。又黄是土，是金所生。我当皇帝全是天意。 
王官三品以上停，四品以下还之。因自陈符命，取 广明 字，判其文曰： 唐去丑口而著黄，明黄当代唐；又黄为土，金所生，盖天启 云。
Those Tang officials ranked above the third grade were all dismissed, while those ranked fourth grade and below remained in their positions. Huang Chao also presented a talisman which read "Guangming". He explained that the character "Tang" minus the components "肀" and "口" and with the addition of "黄" became the character "Guang," clearly indicating that Huang was to replace Tang. Furthermore, Huang represented the element Earth, which was created by the element Metal, symbolizing that it was divine intention for him to become emperor.