How to explain "Gong Zu" in Hainan? Is it fake? !

I come from Hainan. I heard about it before I was in high school, but I didn't believe it. I thought it was superstition and deception. But then someone in my family came into contact with such a person, and I realized that I was short-sighted. When I was a child, I saw adults carrying idols and stepping on freshly burned charcoal. I didn't think much at that time. There are some people on the Gong Zu. Such a thing does exist. It's hard to believe if there are no people I have experienced and met, especially the young people in the city. They can't believe there are ghosts and gods in the world. So they can't explain. Maybe everyone's karma is different.