Ming Dynasty, I Am the True Eldest Son of Hongwu

We don't know whether official history is chaotic or not, but unofficial history must be wild enough. Before Prince Zhu Biao, Hongwu Emperor Zhu Yuanzhang and Queen Ma actually had a son. Don't believe it? Then let's do a blood test. Can you trust me? What, Prince Zhu Biao, my good second brother, he actually wants to return the position of prince to me, and he says that it is the rule to establish a direct descendant and an elder? That's not okay, my ambition is just to be a free prince, I have to stop him...