The first part is about the establishment of "Triangular Organization" Regime, pointing out that the establishment of such regime is the exigent need to resist the Japanese invaders, isolate the diehard, strive for the middle-of-the roamers, and enhance the party's own construction. 论述了建立三三制政权,是抗击日本侵略军、孤立顽固势力、争取中间势力和加强党的自身建设的需要,并对三三制政权的建设情况进行了梳理。