Taiwan policy makers prepared three types of defence policy documents since 1992:National Defense Reports (NDR) published by the Ministry of National Defence (MND) with the nterval of two years (1992-2017). National Security Report (NSR) published by the National Security Council (2006, revised in 2008). Quadrennial Defense Reviews (QDR) published by the Ministry of National Defence every four years, within 10 months after each presidential inauguration (2009-2017). The rest was published during two terms of President Chen Shui-bian (2000-2008) of the Democratic Progressive Party (DPP). Documents from 2017 were published under Tsai Ing-wen’s administration (DPP).