Lower Cambrian rocks have long been known in E Yunnan,As earlyas 1912,J.Deprat discovered Lower Cambrian strata in Chengkiang~1,Iliang~2and several other localities,NE of Kunming~(?).Later,in 1936,V.K.Ting andY.L.Wang reported the occurrence of Lower Cambrian rocks in Malung~3 andproposed the term Tsanglangpu Formation for the Lower Cambrian of E Yunnan