I'm Ready to Lie Flat, but Mother Wants to Become Empress!

(Ninefold Violet, Mo Li, Sparrow Bone, BOSS protagonist, invincible) Li Zheng arrives in an alternate ancient dynasty with the Heavenly Mandate System! But seeing that the crown prince, his eldest brother, is more than twenty years older than him, Li Zheng decides he might as well lie flat. Then one day, Li Zheng looks at the secret reports in his hands and realizes they're all about his own mother!!! “Sixth month, eleventh day, in the seventeenth year of Yongxi: magicians dispatched to create auspicious omens!” “Third month, in the twentieth year of Yongxi: scholars from humble backgrounds won over!” “Sixth month, in the twenty-third year of Yongxi: people sent to create leverage against the crown prince!” But the last secret report shocks Li Zheng the most!! “In the twenty-fifth year of Yongxi: divining the Son of Heaven!!!” Li Zheng had thought his mother was divining about him! But when he opened the report, he discovered that his mother had actually been asking about herself! Mother!!! I was ready to lie flat, but you want to become empress?