Scientists from Seismological Bureau of China put forward the theory of meteorite impact after textual research and geological exploration of the origin: 65 million years ago, a special meteorite hit the southwest of Shandong Province, and the meteorite hit the surface rock and exploded. In the environment of high temperature, high pressure and plasma, interstellar matter and surface rock mixed and infiltrated, and finally landed on the surface, forming pumice, that is, pumice in Sibin. Sibin pumice is the earliest stone named in China. The Pian made of it (the special instruments, utensils and artifacts of the ancient Gong royal family) is called Spencer Pumice, which is a tribute more than 4,000 years ago, and the medical tool made of it is Pian Stone.