What are the three fair?

Confucian scholars in the Western Han Dynasty believe that "three publics" refer to Sima, Situ,. Ancient scholars in China regarded Taifu, Taishi and Taibao as three public officials. There were no three fairs in the Qin Dynasty. The early Western Han Dynasty inherited the Qin system. Since the time of Emperor Wu of the Han Dynasty, the Prime Minister, the Imperial Adviser and Qiu have been called the "three publics" together. Emperor Wu of the Han Dynasty weakened the power of the Prime Minister, and the power of Sima surpassed that of the Prime Minister. The Han dynasty proclaimed itself emperor, changed the number one scholar in the imperial examination to be the greatest, and established a three-metric system with three pillars: Fu, Da and Prime Minister. Although there were three pillars at the end of the Western Han Dynasty, Fu was still the most important. In the new era, the three metric systems of the Western Han Dynasty were used. At the beginning of the Eastern Han Dynasty, there were still three officials, Fu changed to Qiu, Da Situ, and Stuart. These three public officials all have their own government and official families. Taiwei still ranks first in the three fairs. Although Emperor Guangwu of Han Dynasty still set up three senior officials, his real power gradually returned to Shangshutai. The emperor, the golden palace, consorts and eunuchs changed their authoritarian power. Dou Xian and Liang Ji, consorts, are regarded as generals, ranking three. At the end of the Eastern Han Dynasty, Dong Zhuo was appointed as a surname and Guo Xiang, ranking above the three fairs. In the 13th year of Jian 'an (208), Cao Cao gave up his three official positions and chose the prime minister and the imperial historian as his own prime minister. The implementation of the three metric system in the Han dynasty for 200 years is over. Cao Wei restored the three public systems. During the Wei, Jin, Southern and Northern Dynasties, Sangong was still in the best position, and the government set up aides. However, the real power was further transferred to the Shangshu institution. In the Sui Dynasty, the three official positions were no longer open, and all the assistants were revoked, which completely became a virtual position or "upper position". After the Song Dynasty, they were often called Taishi, Taifu and Taibao, but the nature of their virtual titles remained unchanged and gradually evolved into adding officials and giving them away. Ming and Qing are the same.