The present paper deals with the fauna occurring in strata near the Precambrian-Cambrian boundary from well-studied localition in South China. This fauna is similar to the non-trilobite zone (Tommotian) reported recently in other continents. With the exception of a few members the faunal make-up is mainly in common with that of the Siberian platform. Evidently in stratigraphic position the Sinian System may correspond to the Bdiacaran (or Vendian). Furthermore, through chemical treatment of collection by the author have been found some shell fossils of indefinite ta-xon’omie position, which have never been discovered from Lower Cambrian strata in other countries. In short, such a discovery helps to define the base of the Cambrian which is of stratigraphic interest to many geologists.