During the Kaiyuan period, Li Longji was in power, he was decisive in killing and attacking, and his military power was handy. The Great Tang Empire ushered in the prosperous Kaiyuan era that has been praised throughout the ages. A powerful father, a treacherous man with a sweet belly and a sword, domineering and oppressing his prince everywhere. Facing the fate of the country that is about to be swept away by the Anshi Rebellion. My lord, how many inventions do I have to work on? What? To be a crown prince? To be in charge of soldiers? My lord, I still want to practice swords and write poems?