Moreover, young Fierce Beasts' temperaments are not yet fixed, making them relatively easier to train. This is unlike higher-level Fierce Beasts whose characters have already solidified, and getting them to obey is not that easy. Plus, Fierce Beasts that grow up among humans tend to understand human nature better.
Just like the Spirit Tortoise of the Water Element that belongs to the Wang family, because it has always lived adjacent to the Wang family, it evidently understands human nature better than wild Fierce Beasts do.
Many of Wang Shouzhe's children and grandchildren used to ride the Spirit Tortoise of the Water Element to school when they were young.
However, this approach has a clear downside, and that is the long cultivation period.
The Water Element Spirit Tortoise in the family consumes plentiful offerings yearly, and its cultivation base progress is considered fast among its peers. Yet, after decades, it has barely stepped into Level Four.