On February 28 and March 2, 2017, Associate Professor Zhang Pengfei, Director of the Department of Industrial Economics of SEPKU was invited to the University of Pennsylvania and Yale University to hold lectures entitled " Shocks, Skills, and Political Instability in Authoritarian Regimes: A Dynamic Theoretical Analysis ". The seminar analyzed the complicated relationship between the supreme ruler of the authoritarian society and his deputy by constructing an indefinite dynamic game model. Based on the change of exogenous shock, the model not only allows for the long-term existence of stable authoritarian society, but also achieve the balanced results of "cleaning", "coup" and "civil war". Prof. Alexandre Debs, Prof. John Roemer and Prof. Milan Svolik spoke highly of the lecture.