In which period were the nine planetary gears produced? What is it used for?

The Nine Planetary Wheel is a product of the period of Nanyue State, and is used for divination.

The Nine Planetary Wheel is a sacred object used by Nanyue State for divination and a treasure of ancient Nanyue State. When the new king ascended the throne, the contemporary high priest will drive him to judge whether the new king can hold this great position, the life of the people after the new king ascended the throne, and the fate of South Vietnam.