According to Xiang Shan's "old friend's" hypothesis, once human "thought" is fully and completely digitized, it will result in a tremendously large amount of data. This massive file has its own operational rules, matching only specific biological hardware—one could even say that this "software" itself records the information of the "hardware."
But if one were to really break through the black box and organize this data, people might find that the majority of this huge data is "commonality," which is "replaceable."
And what truly determines a person's individual characteristics is only the "last dozens of megabytes of information."
Moreover, this "last dozens of megabytes" representing "a person's characteristics" is also a dynamic piece of information, capable of being modified, written into, and erased by other modules at any time.
Yet at the same time, this tiny module possesses quite high privileges.