Du Yuming called Chiang Kai-shek and asked him to pay attention to this person, and Chiang Kai-shek laughed after hearing this! Born in a scholarly family, Guo Rugui received a good education from an early age, after the outbreak of the May Fourth Movement, Guo Rugui came into contact with socialism, and then was admitted to the Whampoa Military Academy and became the fifth cadet of the Whampoa Military Academy, which also began his military career.
According to historical records, Guo Ruzhi was a native of Sichuan, graduated from the fifth phase of the Whampoa Military Academy, and Gu Zhutong was his tactical instructor. As early as 1928, he joined the Chinese Communist Party, but was later appreciated by Chen Cheng and sent to the Japanese Army Non-Commissioned Officer School for further study, so he broke off contact with the organization. After the outbreak of the War of Resistance Against Japan, Guo Rugui returned to China and became the director of the Operations Department of the Ministry of National Defense. This man was meticulous, thoughtful, and assertive and principled, and was deeply loved by Chiang Kai-shek.
Once, when talking about the corruption of the Kuomintang, Chen Cheng said that the most incorruptible person in the kmt's top level must be Guo Rujie, who never privately accepted the benefits of his subordinates, and even when his socks were broken, he continued to make up for them to wear!
Guo Rujie is the director of the War Department, and a lot of information from all the high-level people must go through his hands, which makes Du Yuming feel very wrong, so he called Chiang Kai-shek overnight and asked him to be careful of Guo Rujie, because he may be a secret agent lurking around him, and Du Yuming also said without concealment that this person is really too clean, not like the style of the Kuomintang!
According to Du Yuming's recollection, Chiang Kai-shek really talked to him once, giving many examples to prove that Guo Rujie was not a red agent. Du Yuming recalled that after this conversation, he also knew the weight of Guo Rujie in Chiang Kai-shek's heart. Coupled with the fact that there was really no ironclad evidence, he would no longer pursue the matter.