The Young Dragon of Zhenguan: The Invincible Prince of Tang

A modern history buff is born into the first year of the Zhenguan era. He enters the world in the Taiji Palace as Li Shimin's seventh son, born to the low-ranking Lady Liu. With no powerful maternal relatives and no backing from the start, he keeps his head down as he grows, gets stronger through sign-ins, and summons divine generals. He rises from an idle prince to a prince with a fief, then to a military commander, the crown prince, and finally the emperor of the Tang Empire.