Introduction: HE Weihong, SHI GR, SHEN Shuzhong -- Geographical location and palaeogeographic setting of studied sections: HE Weihong, ZHANG Kexin, SHI GR -- Depositional sequences, biotic assemblages and review on Changhsingian (or late Changhsingian) palaeo-water depths of studied sections: HE Weihong, ZHANG Kexin, SHI GR, XIAO Yifan, BU Jianjun -- Age analysis and stratigraphic correlation: …