The so-called soul code is not a true soul, and it doesn't even have any impact on the doctor Xue in the Parallel World. He is still working on his projects or perhaps worrying about issues related to the Greeks and the Dragon Race.
Simply put, a soul code is "this person in history." By recording everything about him in history and then entering the body of another person to complete a direct override, you get the creation.
It's somewhat akin to the sense of a cyberpunk mechanical ascension, just like using the soul as if it's a program, like a clone of the soul.
Although it has an extremely high similarity to the original soul, it is ultimately not the same person.
Furthermore, isn't this selling someone else's soul? It's the soul of that version of oneself in the Parallel World, so he feels no burden at all.
