What associations (think tanks or some celebrities founded themselves) were there in China during the Republic of China or what think tanks were there in the history of China?

Think tank is a popular saying at present. There have been many names in history, such as door guest, strategist, counselor, staff officer, consultant and so on. A think tank is a group of two or more people working for the same goal with a harmonious attitude and positive spirit. Think tanks played a very important role in ancient military and other political activities. For example, as recorded in history books and art books, Sun Wu advised He Lv, Wei Wenhou and Sun Bin, and as long as these conditions are met, they can all be called think tanks. There are many such people ... Yang Yongtai, Chiang Kai-shek's chief strategist in the Republic of China, Bai Chongxi, Mao Zedong and Liu Shaoqi, known as Zhu Gejin. In the history of China, there are few think tanks, and only a fool can lead a delegation, such as three heads are better than one.