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根据古生物地理区系资料，阐述下述４个问题：（１）扬子地台中三叠世晚期的海退事件；（２）华南华北陆块的拼合，应发生于中三叠世安尼晚期至拉丁期；（３）三叠纪南盘江“地槽”，实质上是一个断陷盆地，它的最强烈活动期也发生于中三叠世安尼晚期至拉丁期，与华南华北的拼合及扬子地台的海退同时进行；（４）自中三叠世晚期后，华南东部与西部之间在地质发展史上产生了明显的差异运动，特别是晚三叠世和早－中侏罗世
According to the data of paleontology and geography, the following four questions are elaborated: (1) Recession in the Late Triassic in the Yangtze Platform; (2) The combination of South China-North China landmass should occur in the late Triassic Ani Latin Period; (3) “Triassic Nanpanjiang” trough "is essentially a rift basin, its strongest activity period also occurred in the Late Triassic Ani Ni to Latin, and South China North China And the retreat of the Yangtze platform. (4) After the middle Triassic period, significant differences in geologic history occurred between eastern and western South China, especially in the Late Triassic and Early-Middle Jurassic world