The whole revelation by Lord Jiang to LZS reminded me of Star Wars, "LZS I am your father" and him saying "Nooooooo!"…
It made me really sad that he dedicated himself to her even after her death. He deserved better all around. But I wasn't surprised about his succession plans because since the moment they mentioned the grandson had been hidden and saved from death, I thought "Ah, he's going to get the throne one day".