Under the Warring States Period

Ben was chasing and filming a rare lightning tornado, but he didn't want to be involved, so he went back to the end of the Warring States Period. The worst thing is that it is the little-known small country Weiguo. Modifying history will definitely cause irreversible consequences, but how can we survive without modifying history? It is simply a perverted problem, whether to escape back to modern times smoothly or to linger under the fire of the Warring States Period. See how the protagonist turns the tide and advances history without leaving any traces.