唐代自高祖、太宗、高宗、女皇至玄宗前期，上百年间，政治大体清明，经济相当发达，文化繁荣昌盛，国库充足丰盈，赋税负担合理，四方乐业，八方来朝，真是一个空前绝后灿烂辉煌的封建大帝国。后期的百年间，统治者大多昏庸无能，内有宦官专权，外有藩镇割据，内外夹攻，朝政 In the early days of the Tang Dynasty, since the ancestors, Taizongs, Gaozongs and Empress Dowager Xuanzong in the early days, the politics were generally clear and bright, the economy was fairly developed, the culture prospered, the treasury full and abundant, the tax burden was reasonable, the four parties enjoyed good things, Brilliant magnificent feudal empire. During the later centuries, most of the rulers were stupid and incompetent, with the power of eunuchs, the separatism of the military governorates,