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In the Carboniferous,the endemism of biota,the strong glacial-eustatic control over sedimentation and consequent widespread disconformities hamper theselection of acceptabk GSSPs for the Carboniferous stages,including the Serpuldlovian,Moscovian,Kasimovian and Gzhehan.Those relatively deeper-water,carbonate-slope and basinal sections can be served as potential candidate sections for GSSPs.The Naqing Section,which was formerly named as the Nashui section in Luosu,Luodian,Guizhou Province.South China,iS such a slope facies section.More detailed conodont biostratigraphy mainly for the GSSP of the Moscovian Stage has been carried out in recent two years.