C193 White Mission Reward(3)

In timeline 659, the unique ability to split open timelines and traverse to another belonged solely to Zhang Hang-659. Logically, it would have been impossible for her to leave her original timeline and arrive here.

So, it's highly probable that the truth is as Zhang Hang suggested: she was a reward from the system, bestowed upon the man before her—Zhang Hang-457.

With this realization