Great Ming: I'm the Heir Apparent from the Start? This Is a Disaster!

Transmigrating to the Ming Dynasty, he became Zhu Shangbing, the legitimate son of Zhu Shuang, Prince of Qin, from the start. And it happened right after Zhu Shuang was assassinated by a palace maid for his brutality! Zhu Yunwen was about to take the throne and abolish the vassal princes. The Jingnan Campaign was about to begin! This is a disaster! He got a family-bond System, and having relatives means rewards? Should he try to bond with Zhu Yunwen, that ungrateful backstabber? Or have a heart-to-heart with Zhu Laosi? He's doomed!