;The paper is tryed to explore Tsai Meng Jian, He has been in politics for a long time, after he joined KMT, especially his excellent performance in the struggle with the CCP, as the result, he earned the trust of Chiang Kai Shek, with Tsai Meng Jian as the central perspective, explored the operation of the Investigation Section of KMT, and the growth and decline of the agents of KMT and CCP.
At the very first, Tsai Meng Jian learned military knowledge by joined fengtian clique, expected has a chance to help KMT Northern Expedition by his knowledge, after Central Plains War, he became one of the earliest specialist of the Investigation Section. After he arrested Gu Shun Zhang, changed the situation of struggle between KMT and CCP. after that, he participated in the checkmated assisting Hubei, Henan, and Hubei and Western Hubei Provinces, provided the information of military operation of Hubei. We can observed employment concept of Chiang Kai Shek by early development of Tsai Meng Jian.
Overall, the New Culture Movement just bloomed when Tsai Meng Jian was little, he learned both new and old educations, but didn′t learn much, after graduated from middle school, it was the war time of separatist warlord regimes, he went to the northeast military academy, but he forced to go to battle before he finish his training, than he joined KMT which he aspired to, in the case of young and underachievers, it′s rare for the agent to solved the cases and organizations around Gu Shun Zhang. Researched this time of Tsai, could find out the divide of the warlord regimes, struggle of KMT and CCT and how Chiang Kai Shek solved the problems he faced, showed the military and political side of the chaos in the Republic of China in 1930. The case of Gu almost changed the historical track of the development of KMT and CCP, as the most direct relationship person, it′s worth to depth study of Tsai.