Historical Restorer, Making up for Eternal Regrets

So, what are the regrets of history? Is it the tragedy of an empire that survived six generations but died in the second? Is it Feng Langju Xu's ambition, as brilliant but short-lived as a meteor streaking across the sky? Is it the desolation that makes a hero burst into tears when he dies before leaving the army? Is it the final chapter of "The sky is clear" under Feng Bo Pavilion, the beacon fire that crushes the twelve gold medals and goes straight to Huanglong? Is it the silent mournful cry of the death of the king, and the hanging of a white silk silk to break the backbone of China?