From the anthropomorphic gaze of the black cat, Li Yi could easily determine that his mother's soul was attached to it.
This is also a risky but necessary action for soul crossers. If a soul doesn't attach to a small animal, the soul of an Evolver will gradually dissipate, unless you cultivate the soul into a Primordial Spirit to stay in the human world permanently.
But at that time, reaching the Soul Realm for Evolvers was already considered to be a top-level expert, as even the Evolver's cultivation system hadn't been perfected, and many realms relied entirely on exploration.
Li Yi's parents had cultivation at the Soul Realm back then; if it weren't for the cross-border incident, he would have already led an elite lifestyle, rather than working for six years and wasting valuable cultivation time.
"Manipulating time is an extremely dangerous task. I rarely do it, but you and your mother are exceptions, as you are not from this world and have no impact on it."