值此黄汲清先生100周年冥诞之际，我们深切地感念先生对后学的奖掖提携，十分钦敬先生早年在我国二叠系学术园地里的辛勤耕耘和丰硕成果。令人感动的是先生以耄耋之年，仍然关注和督促着我国二叠系的研究，并且在二叠系“三分”和下界国际化的认识回归中作出无人可以替代的重大贡献。

Professor Huang Ji qing (Huang T.K.) devoted his early years to studies of the stratigraphy, corals and brachiopods of the Permian System in South China. Based upon the studies, he emphasized the reality of three fold subdivision of the Permian System in South China, in descending order, the Lopingian, Yangsinian, and Chuanshanian, with a comparable bottom boundary to those of the classic areas around the world. However,in the subsequently accepted scheme only the former two series were retained, while the last series was excluded from Permian and included in the Carboniferous based on an obvious depositional break between the second and third series on the Yangtze Platform. Although Huang's professional career was mainly working on tectonics, he had been still keeping an eye on the study of Permian System in China since the late thirties of the last century. The discovery of the continuous sequences ranging from the Carboniferous to Permian in southwest Guizhou and northwest Guangxi provided him an evidence for reviewing the subdivisions and lower boundary of the Permian in South China. An almost the same three fold scheme as fifty years ago, Lepingian (formerly, Lopingian), Yangxinian (formerly, Yangsinian) and Qiannanian (formerly, Chuanshanian ) was suggested again and dramatically appeared in his last monograph (Huang and Chen, 1987). Now, the Chinese geologists have already generally accepted this scheme.

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