Introduction to the Presidential Palace Office Building: The Presidential Palace Office Building is located at the northern end of the central axis of the Presidential Palace. It is the main building of the Presidential Palace. It is also known as "Zichao Building" because Lin Sen, Chairman of the National Government, was named Zichao. This building has served as the office building of the National Government and the Presidential Palace successively. It houses Lin Sen's Chairman's Office, Chiang Kai-shek's President's Office, Li Zongren's Vice President's Office, Secretary-General's Office, and the State Council Hall.