On October 27, 2014, at the Far Eastern Studies Seminar organized by the Department of Far Eastern Studies of the IOM RAS, Sergey V. Sidorovich, a doctoral candidate at the M.A. Usmanov Center on Research of the Golden Horde History, the Sh. Marjani Institute of History, the Tatarstan Academy of Sciences, will submit his presentation, Some Revision of the Periodization of Xi Liao Dynasty on Basis of the Numismatic Data [Уточнение периодизации династии Си Ляо на основе нумизматических данных].