Since the 18th National Congress of the Communist Party of China (CPC) held in 2012, XI Jinping, General Secretary of the CPC Central Committee, has made a series of vital expositions on the promotion of modernization of the national governance system and capacity in line with the rule of law. The law is the most important tool for governing a country, and the rule of law supports the national governance process and capacity. Promoting the rule of law on all fronts is an essential requirement for developing socialism with Chinese characteristics and promoting the modernization of the national governance system and capacity. Comprehensive law-based governance in all areas should be promoted to advance the modernization of national governance. Furthermore, law-based thinking and methods should be used to address difficulties and challenges faced in this modernization process.