I Transmigrated into Xuanwu Gate and Faced Li Shimin Head-On

[Adapted to fit the historical setting + Almost No System + Political Intrigue + Ensemble Cast + War + A Desperate, Uphill Battle from the Start; Defy Heaven and Turn the Tide] [A top humanities student uses all their historical knowledge, including the Sui and Tang dynasties and modern history, and the wisdom of history’s great figures to fight the ultimate carbon-based life-form: Li Shimin]

A graduate student in history transmigrates straight into the Xuanwu Gate Incident. Li Shimin’s troops are right before him, and he has one year: either ascend the throne or die. He has no scientific knowledge to fall back on, so he cannot build cannons, glass, or soap. All he can rely on is his knowledge of history, and a System that makes people vanish by faking their deaths as soon as they are brought into the world. Facing Li Shimin and his team, including Zhangsun Wuji, Fang Xuanling, and Du Ruhui; facing Emperor Li Yuan and the Crown Prince, how can Li Yuanji, with no connections and no capable generals, turn the tide? Can he really change history, or will he end up Li Shimin’s prisoner? (Adapted to fit the historical setting, with some historical details changed for the sake of the story. This isn’t a strictly faithful historical fantasy, so readers who care deeply about historical accuracy may want to steer clear.)