I Clocked in History in the Past

If history cannot be changed, does witnessing still have meaning? Bai Yan, a low-level bully, unexpectedly gained the ability to travel through time and space, but found that he could not change any history. He was forced to become a bystander of history, possessing insignificant characters - slaves of the Shang Dynasty, prisoners of the Qin Dynasty, grooms of the Tang Palace, eunuchs of the late Ming Dynasty... Witnessing with his own eyes those tragic moments that were understated in history books, but that shocked people's hearts.