The protagonist travels through time + Ying Zheng is reborn + no system + no encyclopedia + no omniscience
The protagonist A Qin traveled back in time to a time when Brother Zheng had not yet unified the Six Kingdoms, and successive improvements in technology failed. A Qin discovered that the novels were all lies, and there was no specific technology. He could not achieve anything after time travel, and was even imprisoned and was about to face corvee labor. How should he break the situation?
Ying Zheng was reborn in Sand Dune and knew nothing about what happened after his death. After confirming the fact of his rebirth, Brother Zheng accidentally met Ah Qin who was in trouble.