The Son of Heaven of the Tang Dynasty

During the Wu Zhou era, the empire faced troubles at home and abroad. At court, a struggle over the succession raged; beyond its borders, the Later Turkic Khaganate, Tibet, and the Arab Empire posed constant threats... Yang Chen arrives in this turbulent time, when the Wu clan holds sway and the Li clan is in peril, and becomes the young Li Longji. How will he ascend the throne? How will he usher in the Kaiyuan Golden Age?