The Dissolute Imperial Grandson

A modern all-powerful soldier king is reincarnated into the Great Qian dynasty as the imperial grandson, who is saddled with seven beauties. He starts in a hellish scenario: 'overindulging' before the crown prince's spirit tablet, with all court officials wishing him dead. The third prince feigns filial piety, the fifth prince eyes the throne with a cleaver, and Consort Yu secretly plots against him. Everyone thinks he's doomed, but he turns the tables, rises to power, and rules the world. — Description from novelcodex.org