As the direct core, Liu Menggeng participated in and organized many important events that influenced the history of China. For example, Liu Menggeng used intelligence analysis to get Anhui's weakness. He actively advocated going to war against Duan Anhui, which made Duan Anhui in a weak position in fighting against Anhui, and finally ended in defeat. After the war between Zhi and Wan, Liu Menggeng, as the detective director of Cao Zhi in Beijing, collected information from all sides extensively and defeated Feng for the first time on 1922. After the first direct service, Liu Menggeng used the then Speaker of Parliament, Wu Jinglian, to promise him that Cao Kun would be the Speaker, Wu Jinglian would be the Prime Minister as bait, and Wu would actively canvass for Cao Kun. After Cao Kun was elected, Liu Menggeng organized a Constitutional Party with some members and directly under the high level. Under the guidance of Liu Menggeng, the Constitutional Party soon became the largest party in Congress. Wu Jinglian's dream of becoming prime minister has not only come true, but even in Congress. Liu Menggeng also ordered Feng Yuxiang, the police chief stationed in Beijing at that time, to actively overthrow Wu. Finally, Wu had to flee to Tianjin, and Wu Jinglian's failure was regarded as the failure of the direct Tianjin faction. However, under the pressure of Liu Menggeng's use of Tan, Yan Huiqing's cabinet, which was pro-Wu, collapsed, and Wu had to quit Beijing, announcing that he would not interfere in politics and go to Luoyang for training. At this point, a direct division and faction dominance have been formed. Liu Menggeng supports democratic politics and parliamentary politics and advocates a country ruled by law. On the same day that Cao Kun was elected president, the most democratic constitution in modern China was born, which was the result of the active efforts of this warlord Liu Menggeng. After the second direct service, Zhang personally identified himself as one of the eight direct principals, with tachileik as the second direct leader, Cao Rui as Cao Kun's fourth brother, Jing, Liu Menggeng as prime minister, supplemented by Gao. Liu Menggeng is also one of the four direct murderers listed by defected General Feng Yuxiang. The direct four murderers are Cao Kun, Wu, Cao Rui and Liu Menggeng. Because Feng Yuxiang imprisoned Cao Kun after the coup, Cao Rui committed suicide, Wu and Liu Menggeng were not in Beijing, and Feng Yuxiang sent someone to arrest the munitions director and financial director Wang Kemin for money.
Liu Menggeng's property
There is no exact figure on how much wealth Liu Menggeng has, but Liu Menggeng's secretary once thought that it is not an exaggeration to say that Liu Menggeng is the richest man in Beiyang. Liu Menggeng has been an official for nearly 30 years and accumulated huge wealth. Tianjin Mint is known as the first fertilizer worker in the Republic of China. Judging from Liu Menggeng's official road map, his officials are all fat. Liu Menggeng is bold and cautious, with high hands and eyes. There is reason to think that he should be a millionaire. There is a joke. Before his second direct service, Cao Kun asked Liu Menggeng to investigate the property of Beiyang senior officials. Liu Menggeng made a very hard investigation. When the secretary handed the survey results to Liu Menggeng's desk, Liu Menggeng found that his name was impressively behind Zhang, but before Cao Kun, ranking second in the Beiyang rich list. This made Liu Menggeng embarrassed and annoyed, and cursed his men for being confused. Liu Menggeng quietly revised the list and sent it to the Presidential Palace in Cao Kun.