In English, so is used to express the meaning of inheriting the last article, just as SO DO means "me too".
Therefore, it is also correct for Rhett to appear here, because Rhett wants to express this meaning, but by
If there is an old cloth in front of him, he will use so instead of here.
Old Bu, who couldn't adapt to life outside prison, chose to die after carving these words, while Rhett, who also couldn't adapt to life outside prison, chose to live again, because his good friend Andy was waiting for him in the distance, and Andy gave Rhett a reason and hope to live.