Da Qin: I Am Meng Yi, a Capable Minister of Da Qin

Meng Yi, a top university student in his previous life, unexpectedly returned to the Warring States Period and became the younger brother of the famous Qin general Meng Tian and a good friend of Qin King Ying Zheng. At this time, the Qin State had not yet annexed the six kingdoms, and the Qin King was not the first emperor who was praised and criticized by descendants. Can the ending of the death of the second generation of the Qin Empire be saved? How should he, who is familiar with history, change everything?