Why does Original Gods say that Zhong Li and Walnut are father and daughter?

Inside the manga of Proto-God, Walnut was adopted by Zhong Li .

And Zhong Li, as the incarnation of the Rock God on earth, he is very kind to Walnut. And since Walnut is a fire-attribute magician character and Zhong Li is a rock-attribute gun-type character, the two of them paired together can play curing. And Zhong Li adopted Walnut, so it's equivalent to Walnut, being his daughter, of course it's good to him.

Background of Zhongli's character

In Riyue's tradition, "inviting an immortal" is as important as "sending off an immortal". There is no one who specializes more in "sending off" than the "Hall of the Dead", which has been passed down by the Hu family for seventy-seven generations. However, the master of the hall, Hu Tao himself, mainly focuses on the art of sending off mortals.

The rituals of sending off an immortal are left in the hands of a "friend of the road", Zhongli. Immortals have spent a long time with Li Yue, and the fact that so few have ascended to the heavens in the last 3,000 years means that all the associated traditions exist only on paper, and the time span is far too long to be the kind of event that you can attend as a child with a candy cane in your mouth, and then witness again when you're old enough to be reclining in a bamboo chair.

But even the most discerning, old-schooler obsessed with old paper piles couldn't find anything wrong with the ceremony organized by the "Hall of the Living". Not only is the dress of the people in the ceremony in order, but also the auspicious time, place, and equipment of the ceremony, as well as the weather on that day, the length of the ceremony, the number of people allowed to observe the ceremony, and the age of the observers' status and occupation, even if all of the above are included in the category of measurement, there is nothing that is not in accordance with the etiquette.