Disaster Strikes the Immortal Realm, and I Somehow Become the Source of the Supernatural?

As the seven strongest members of humanity fought a decisive battle against the Seven Kings of the Uncanny, Li Yuan quietly stepped out from the cultivator army.

Emperor Daoyuan roared, "Disciple! Get back here! It's dangerous!"

Li Yuan shrugged innocently, his eyes fixed on the Seven Kings of the Uncanny.

Then all seven Kings of the Uncanny fell to their knees!

"Father!"

Then the army of the Uncanny and the cultivators joined hands and began singing...

Based on the article above, briefly explain why twenty-five-year-old Li Yuan became the father of the Seven Kings of the Uncanny, who were over a hundred thousand years old, and evaluate Li Yuan's despicable behavior of playing the pig to eat the tiger. This question is from the Worldwide Knowledge Contest for Junior and Middle School Cultivators, Year One of the Primordial Era.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Please do not imitate.