No cell phones, no digital cameras, and no smart wearable devices -- the Guizhou provincial government has revised a regulation to keep the noise down and prevent human activities from affecting the world's largest telescope.
The blanket ban is enforced on radio equipment and electromagnetic gadgets, including tablets, speakers and drones, in the core silence zone of the Five-hundred-meter Aperture Spherical Telescope (FAST).
The total quiet area of FAST includes a 5-km radius as the core zone, 5 km to 10 km radius as the intermediate zone and a peripheral zone that covers 10 km to 30 km in radius.
Visitors and tourists who enter the quiet area shall abide by the regulation to minimize confusing operations of the telescope.