序　　　言林丹汗(ｌｉγｄａｎ)从17世纪初开始活跃到1634年(明崇祯七年,清天聪八年)病死为止,主要在蒙古地区掀起了种种波澜。关于他的活动,一方面是含混不明,如海西希教授评之为蒙古的最后一位大汗。另一方面也有和田清那样的说法,即:他在东邻满洲的威胁下从根据地逃窜到西? Preface LYdan is active from the early 17th century until 1634 (Ming Chongzhen seven years, Qing Cong eight years) died of illness, mainly in Mongolia, set off a variety of waves. On the one hand, his activities are ambiguous, as Professor Hercynian called the last sweat of Mongolia. On the other hand, there is a statement from Hetian that he fled from the base to the west under the threat of Manchuria to the east.