at that time, there were four secret authorities in Chongqing, commonly known as the "four courts". Of course, the No.1 Hospital belongs to Chiang Kai-shek, the No.2 Hospital belongs to Wang Jingwei, the No.3 Hospital is the "dark room" of the No.1 Hospital, and the No.4 Hospital is the "secret room" of the No.2 Hospital. These four courtyards can't be found in the administrative establishment, but they can control and influence many affairs, national, D-affairs, military and administrative, and they are not restricted everywhere. At that time, Colonel Lu was a member of No.3 Hospital, which was called the seventh office of the Military Commission, with Mr. Du as the director and Fu as the executive deputy director. He was a lieutenant general-this shows the high level. Colonel Lu is the director of the third division of the office, mainly responsible for domestic security affairs. To put it bluntly, he is helping the chairman to find dissidents privately.

-Mai Jia's Wind Talk

Simply put, it is a symbolic symbol, and such institutions will exist forever at all times and in all countries.