This paper looks into four periods of miiiiary construction after 1949, with special emphasis on Deng Xiaoping's defense modernization program initiated in 1979 and its development after 1990 with emphasis on quality and efficiency. Also analyzed is China's inward looking and cutwarc looking military construction strategies in line with the desire to protect its national interests characterized by internal economic and social changes as well as gradual expansion of external geopolitical viewpoints. Political challenges in the regional security environment has emerged along with the strengthening of the PLA's fighting capability and inevitable responses of consolidating the strength of alliance among regional powers.