Cheng Shi had to face the changes in the experiment, and he could not rely solely on the utterly empty belief of "believing in himself and believing in [Yuan Chu]" for support.

He had to consider a possibility: what if everything right now was just a "script" crafted for him by the Creator, the "meaning" of his existence as a variable, and His purpose was to make him mistakenly believe that "the [Origin] is predetermined"? In that case, what should he do?

Therefore, he must pay attention to the details of the experiment, after all, this is his original intention, and it is very likely to become the source of his inspiration for resisting the [Origin].

He needs the experiment to resemble himself, but he also needs the experiment to have enough variation.

To achieve this, pure memory replication is not feasible, as subjective memories would render the "real" outcome in the experiment inaccurate...

He realized he had to remain neutral; in other words, he had to be as much like the "Primordial One" in the Creator's experiment!

He needed to recognize his role in the experiment and not try to control "Cheng Shi" with his own will. He had to put away his goodness, abandon his evil, suppress his desires, restrain his emotions, and no longer develop any inappropriate feelings for "Cheng Shi" and his friends...

He wanted to be an outsider; he was merely an observer.

etc!

Why does all of this feel so familiar?

When Cheng Shi thought of this, he suddenly froze. Then his consciousness began to roar as countless memories flooded into his mind.

He recalled again how, in that sham ending, the "deception" played by the Outer God had given him two choices.

...