After more than two years of research, Chinese scientists found the TRILOBITE FAUNA before the mass extinction of Late Ordovician organisms in South China for the first time in Zhenxiong County, Yunnan Province, located in the northeast of Yunnan Province, which provides an important window for comprehensively revealing the appearance of marine organisms on the western edge of the South China plate, and further confirms the existence of paleontological”shelters” when the regional environment deteriorates.