After Fake Name, I Become Princess's Lover and Rule the World

Modern researcher Lin Mo accidentally travels to ancient times, becoming the son of the Prefect of Tongzhou in Great Qian. After being kidnapped upon arrival, he escapes using modern wisdom and is saved by Jiang Lingyi, leaving him with a massive debt of 100,000 taels of gold. Using modern knowledge to improve accounting and inventing 'Koukai Le', he resolves a crisis of imperial examination fraud, astounds everyone with poetry, and wins the favor of Princess Jianjia. Learning that Jiang Lingyi is being coerced by the Marquis of Pingnan, Lin Mo punishes the Marquis's heir, cleverly seizes the Marquis's private property Xueyue Pavilion, and goes deep into the Marquis's mansion to tear up an unequal contract for Jiang Lingyi, thwarting the Marquis's conspiracy. In the end, Lin Mo brings his beloved home and lives with Jiang Lingyi, starting a legendary life of ruling the world.