Dreaming Back to the Late Tang Dynasty

The prosperity of the past has faded away, Chang'an is urging horses and Luoyang is in a hurry, the gold in the sky is still there, and the emperor is not seen, but the king is not seen. At the end of the Tang Dynasty, the vassals and towns were separated, the imperial power was trampled on repeatedly, and the centralization of power was in name only! In a troubled time where heroes competed for power, five political regimes were established in blood and fire! Li Kangxuan, who traveled to the past, wanted to use his own efforts to save the Tang Dynasty, which was facing collapse! How should history be rewritten?