Gong Ji was once a part of Zhou Li. The Rites of Zhou includes six chapters: Celestial Officials, Local Officials, Spring Officials, Summer Officials and Winter Officials, hence the name "Zhou Officials", also known as "Zhou Official Classic". When the Western Han Dynasty proclaimed himself emperor, Liu Xin sorted out the books collected by the secret government, and then included Zhou Guan in the bibliography. However, there is a lack of a winter official, so we added the flower prince, so it is also called Zhou Li? Test records. " At the beginning of the examination in Gong Ji, it was said that there were six post stations in the state, and all the workers lived in one place. This view, on the one hand, talks about the importance of "hundred workers", on the other hand, it also shows that "hundred workers" belong to official handicrafts.
With more than 7 100 words, Flower King Gong Ji describes the contents of 30 jobs in six categories, such as carpentry, metalworking, leather, dyeing, scraping and grinding, and ceramics, reflecting the scientific and technological level reached by China at that time. In addition, Kao Gong Ji also contains a lot of knowledge and experience in mathematics, geography, mechanics, acoustics and architecture. This book describes the design specifications and manufacturing techniques of various handicrafts in Qi State. It kept a lot of information about handicraft production technology and arts and crafts in the pre-Qin period, and recorded a series of production management and construction systems, which reflected the ideas at that time to some extent.
Kao Gong Ji is the earliest handicraft technical document in China, which occupies an important position in the history of science and technology, arts and crafts and culture in China. This was also unique in the world at that time. Therefore, the annotations and studies on it have emerged in an endless stream. Among them, outstanding scholars include Zheng Xuan in the early Han Dynasty, Jia in the middle Tang Dynasty and Dai Zhen, Cheng and Sun Yirang in the late Qing Dynasty.