This paper examines the new trends of interaction between the legal transformations in China and the international investment treaties, focusing on the legal reforms after the Fourth Plenary Session of the Eighteenth Party Central Committee Fourth Plenary Session of the 18th Party Central Committee of the PRC of 2014 (2014 FPS). It envisages that the 2014 FPS will impose significant influence on the current legal system in China, on the forthcoming Foreign Investment Law of China, and eventually on the negotiation and application of the international investment treaties concluded by China because the CPC Central Committee Decision on Certain significant Issues regarding the Comprehensive Promotion of Law (PCC Decision) has demonstrated the directions of legal constructions and reforms explicitly and comprehensively from the administrative, judicial, social, and jurist perspectives, which constitutes the most inclusive PCC Decision regarding Chinese law and justice.