In the Tang dynasty, the system of three provinces and six departments was implemented, and the secretary province was not within the three provinces. The so-called province, the original meaning is palace, and later evolved into a government office. The yamen called the province in the Tang Dynasty were all in the palace area. Since the Eastern Han Dynasty, the Secretary Province has been responsible for the work of royal books and archives. At that time, books and files were all hand-copied, and many of them were exclusive collections of the royal family, which were invisible to outsiders, so they were called "book secrets" or secretaries for short. This is where the word "secretary" in modern Chinese comes from.
In the secretary province, the official responsible for editing and proofreading is called the school book lang, whose grade is below the ninth grade, and he is a real sesame official. However, this position is often used to place people who have just passed the imperial examination. Not far from the emperor and the power center. It has a good future, and it does not do so-called vulgar government affairs, so it is very popular with scholars.