It was also the leading topic at the international symposium on triassic chronostratigraphy and biotic recovery held in chaohu , anhui province from 23 ( superscript rd ) to 25 ( superscript th ) may 2005 这也是2005年5月在安徽巢湖召开的“三叠纪年代地层与生物复苏国际学术会议”上的主导论题。