I Transmigrated to Become an Emperor!

Li Sheng, a veteran Paradox grand strategy game player, is transported from his own home to the Great Qian Dynasty, where he becomes the overlooked thirteenth prince and is made Prince of Liang. In Liangzhou, he recruits troops, builds the Great Wall, and fights the foreign tribes beyond the frontier. Later, a struggle for the throne erupts in the Great Qian Dynasty. Every other heir is eliminated, and in the end, they choose Li Sheng as emperor. Only after Li Sheng arrives in the capital do the civil and military officials of Great Qian truly understand what kind of emperor they've chosen... What do you mean, the emperor has a million troops in Liangzhou? What do you mean, His Majesty built the Great Wall in Liangzhou to fight the chaotic foreign tribes? What do you mean, when His Most Respected Majesty loses his temper, he can transform into a giant dragon and personally beat the rebel army to death? And what do you mean, His Most Respected Majesty, the Haotian Dragon Emperor, made the entire Great Qian Dynasty ascend?