(Not brainless, but don't overthink it either; a mildly satisfying story.) Please bear with any parts that don't quite make sense.
On the night he was surrounded on all sides, the Conqueror bade farewell to his beloved. History's script had long been written: Xiang Yu would take his own life at the Wu River, and Liu Bang would found the Great Han dynasty, which would last four hundred years.
But when a top chemistry student from a prestigious university, well-versed in history, transmigrates into Xiang Yu as he is besieged at Gaixia...
The script has to change.
The Prestige System awakens. Three thousand Iron Pagodas crush Han Xin's camp. The secret network of the Unworthy Ones, the Heavenly Stems, and the Earthly Branches spreads across the realm. Modern knowledge transforms the fertile lands of Jiangdong.
He cuts a path through the encirclement on all sides, then rises again from the mire of public condemnation.
The headstrong Conqueror kneels before the people of Kuaiji, while the God of War, who once knew only battle, takes up his brush to draw plans for irrigation canals.
Yu Ji is still alive, Jiangdong still stands. Though only three households remain in Chu, it will be Chu that destroys Han.
“I'm not here to rewrite history. I'm here to fight through it all over again.”
Such a good-looking book has a compact plot, is not witty and entertaining, and strictly adheres to the historical timeline.