Brief introduction of prime minister's institution

In the Tang dynasty, the number of prime ministers was rare in the previous generation. In the early Tang Dynasty, the organs of the three provinces were prime ministers, and "the post of prime minister was also discussed by the ministers of the three provinces, who also served as ministers" (New Tang Book). Baiguanlu "). Since then, it has been changed frequently with various names, but despite many changes, Zhongshu, Menxia and Shangshu provinces are still regular. When the name of a province changes, the name of the governor in the province generally changes. At the end of the Tang Dynasty, Zhong Shuling served in the middle school and was renamed as Neishiling. Right, left, son and Huang Menjian were all prime ministers. After Emperor Gaozong, the prime minister's work was done with "the same book in the car" or "the same book in the door". Even the governors and prime ministers of the three provinces are not allowed to participate in the government affairs hall and lose their position as prime ministers without adding the titles of "the same three products" and "the same chapter".