Resurrected at the Funeral, the Old Zhu Dotes Madly

In the 15th year of Hongwu, Zhu Yunye, the legitimate grandson of the Ming Dynasty, died prematurely from illness. Inside the imperial mausoleum, Emperor Zhu Yuanzhang was grief-stricken, and the court was trembling with fear, worried that this iron-fisted ruler would unleash a bloody purge. However, just as the coffin was about to be nailed shut, a dull knocking sound came from within! Reborn with a 'National Fortune Mystery Box System' and a broken modern research vehicle, Zhu Yunye not only kicked open the coffin lid but also pulled out a box of amoxicillin, saving Empress Ma from the brink of death. From then on, the early Ming Dynasty's style completely changed. In the court, Old Zhu remained decisive and ruthless, but in the harem, this iron-fisted emperor turned into a doting grandfather without limits. With high intelligence and emotional quotient, Zhu Yunye understood imperial psychology well. Using limited modern supplies and knowledge blueprints, he gradually transformed the Ming Dynasty like a frog in warm water. From sweet potatoes and potatoes to firearms and cannons, from Ming Dynasty banknotes to global trade, watch the eight-year-old prodigy grandson, amidst extreme doting, use physics and technology to crush the era and lead the Ming Dynasty to the pinnacle of an empire where the sun never sets! — Description from novelcodex.org