This paper conceptualises the spill-over effect of the Chinese Communist Party’s regulation of political speech on China’s constitutional framework to the extent that it might reshape the global contours of speech regulation. The paper will trace the historical lineage of the intra-party doctrines of speech regulation, ruminate the normative doctrines, decipher the institutional reconstruction of speech regulation regenerated by relevant new constitutional mandates and featured by dualistic Party-state governance. The paper will also explore how China weaponises its authoritarian approach to international law by virtue of such constitutionalised speech-regulatory work. Finally, the paper forecasts the prospect of the spill-over effect amidst the tension between the global constitutionalist call and the challenges posed by worldwide growing authoritarianism. The article argues that such global effect could be penned by the genetic paradox of its underlying political ideology.