God's Throne Game: Only My Sister Is Left at the Beginning

My name is Su Chen, the eldest son of Su from Licheng. Three days ago, I died. I don't know who this "I" who is alive now is. He inherited my memories, my emotions, and... My sister. If he can live for me and protect her for me, then my death will be worth it. But I know that those people will not let the Su family go. So, you have to be careful about that "I". Also, if you hear someone call you "Q," don't look back. That's... ——The above text was written on a burnt piece of paper and was pressed under Su Chen's pillow. The date was three days ago.