Transmigrating to the Great Ming, I Become Hongwu's Only Younger Brother

[Court Intrigue + No System + Zhu Yuanzhang's Favorite + Hongwu's First Prince + Technological Revolution] On a barren hillside, two frail figures support each other. With a solitary grave behind them, they walk until their bodies merge into one. Zhu Yi: Fourth Brother, I'll listen to you from now on. We'll make soap, perfume, and alcohol. I'll give you all the money we earn, so we won't have to suffer anymore. On a battlefield, smoke billows everywhere. Suddenly, a blade comes flying. Zhu Yi hurriedly shoves Zhu Yuanzhang aside and shouts, “Brother, go! I'll cover you!” Zhu Yuanzhang refuses to leave. “No! You'll die, little brother!” At a glance from Zhu Yi, one of the guards behind him strikes Zhu Yuanzhang on the back of the neck, and he collapses unconscious. I can die, but you can't. Besides, if you haven't died, how could I? Zhu Yuanzhang looks at his bloodstained younger brother and weeps uncontrollably. Zhu Yi slowly wakes and takes Zhu Yuanzhang's hand. “I'm fine, Brother. Just ask Sister-in-law to make me two sesame flatbreads.” Then he passes out again. The scene shifts. Zhu Yi says, “Under my elder brother's rule, the people live in peace and prosperity...” A distant voice cries, “Baka!” Zhu Yi: “??? Where's that dog barking coming from?” Servant: “Your Highness, Japanese pirates are abducting women over there.” “Those puny pirates dare to insult the people of our Great Ming? Bring me my blade. Kill them!” At a temporary princely residence on the coast, a group of Japanese pirates surround a young man, his body covered in knife wounds, blood spilling from his mouth. The scene shifts. All the pirates lie dead. The young man stands with difficulty, leaning on his sword. Looking toward Yingtian Prefecture, he says, “Brother, I won. They couldn't beat me. This may be the last time I protect our Great Ming...” Before he can finish, he slowly collapses. The emperor and empress weep bitterly. The ten dukes all volunteer to lead an eastern expedition, leaving not a blade of grass standing...