Comprehensively and strictly governing the party is a sharp weapon for the Chinese Communist Party to deal with the "four tests" and "four dangers" of its governance. The actual effect of its promotion is related to the prosperity and decline of the party, the destiny of the country, the future of the nation, and the happiness of the people. In order to fully release its effect in the complicated situation, the key to comprehensively and strictly administering the party lies in compacting the mass line. The concrete mass line runs through the whole process of putting forward, advancing, and testing the idea of comprehensively and strictly governing the party. The more vigorous the development of socialism with Chinese characteristics in the new era, the more we must tighten the string of comprehensive and strict governance of the party, and compact the mass line step by step with perseverance on the road.