C529 A Place of a Thousand Years 38 Places

The Star Combat Device Wan Cheng spoke of was a unique tool to measure the weather in this world. It was interconnected by three large rings. In the middle of the three large rings, there were a dozen or so small rings that did not interfere with each other.

There were scale lines on the rings that were aimed at the sky. They could be used to measure the stars that were being observed