Once upon a time, there was a mountain, and on that mountain was a tree. The tree became a spirit.
After spending a hundred years or so alone on the mountain, the tree spirit finally couldn't take it anymore and fell asleep.
When it woke up, there was a little house in front of it, and someone was living inside.
When it woke up again, a vine had grown on one of its branches, bearing seven gourds. Oh, so I was a gourd tree. The seven gourds slowly grew, and the tree spirit was delighted.
But when the seven gourds it had raised called someone else Grandpa, the tree spirit got angry.
Let go! I'm your grandpa!