Go to the temple to draw lots. There is a bowl on the ground. There is a board on the bowl. People knelt on the board and turned around. What principle, supplement, iron bowl, land, bowl and

That bowl is strong magnetic, and ordinary magnets are black, similar to stone texture. And strong magnetism is like iron. There must be an electromagnetic coil buried underground. Once electrified, electromagnetic repulsion will appear when the magnetic bowl is placed on it, thus making the bowl rotate. Just like the principle of electric motor.

The landlord must have been cheated by this high-tech player.