Neifu has a long history of development, which appeared before the Song Dynasty. Many people believe that the Library Pavilion was initiated by the Emperor of the Song Dynasty. In fact, such a system appeared in the Western Zhou Dynasty. During the Western Zhou Dynasty, the state property was divided into three parts, one of which was dedicated to the emperor, which was the so-called warehouse in the Song Dynasty.
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In the Han dynasty, the hidden treasury began to appear. In the Han Dynasty, the emperor began to build his own coffers slowly. At that time, the treasury management needed to be used for projects needed by the country, and the emperor could not use it at will, so the emperor began to slowly prepare his own small treasury to satisfy his daily fun. The cost of royal drama is very huge. By the Eastern Han Dynasty, the treasury owned by the emperor at that time had expanded to a certain scale.
The secret storehouse has been developing continuously since the Western Zhou Dynasty, and the purpose of its expansion is to satisfy the emperor's luxurious life. In the Song Dynasty, Zhao Kuangyin began to slowly accumulate his own coffers. Most of the property in the national treasury comes from the gold, silver and jewels obtained during the war. At that time, the purpose of Song Kuangyin's establishment of the repository was not only to satisfy his daily eating, drinking and having fun, but also to provide a disaster relief fund for the country when it was in crisis. In the Song Dynasty, the inner house had dual functions, on the one hand, it was the emperor's own small treasury, on the other hand, it was also the national treasury.