This dissertation explores the evolving discourse of the Chinese Communist Party (CCP) regarding the ‘Taiwan Question’ and the ‘one China’ principle under the leadership of Xi Jinping compared to his predecessor, Hu Jintao. The study argues that the CCP’s central ideological thought, particularly its relationship with Taiwan, reflects Jaques Lacan’s theory of an inherent subjective lack that resists complete symbolization. Through a poststructuralist discourse analysis grounded in Lacanian theory, this research examines how the CCP’s dialectic relationship with Taiwan has shifted across government controlled academic journals, particularly in the Xi era, where the notion of Taiwan as ‘lost’ or ‘separated’ has been increasingly rejected, and the conceptualization of Taiwan and the Taiwanese as ‘traitors’ has been amplified. This shift is analysed through the Lacanian concepts of castration, perversion, alienation, and lack, and reveals that the CCP’s move towards a discourse that denies any historical separation not only reflects a radical shift in China's self-perception, but is also symptomatic of Lacan’s image of castration-disavowal. It concludes that a Lacanian poststructuralist approach provides significant insights into the CCP's changing narrative on Taiwan and its broader implications for China's place in the modern international order.