What are the characteristics of ancient Chinese agricultural books? For example, how to distinguish between "books for the people" and "books for pan-sheng"?

The inclusion of farm tools as an important part of the comprehensive agricultural book began with the "Wang Zhen Farming Book" and is also a major feature of this book. my country's traditional agricultural tools have developed to a mature stage by the Song and Yuan dynasties, with a complete range of types and diverse shapes. In the Song Dynasty, special books on agricultural tools appeared in a more comprehensive manner, such as "Agricultural Instruments Genealogy" written by Zeng Zhijin in three volumes and continued in two volumes. Unfortunately, the book has been lost. The number of "Agricultural Instruments Atlas" in "Wang Zhen's Agricultural Book" is unprecedented. There are only more than 10 kinds of agricultural tools mentioned in "Book of Pansheng", and only more than 30 kinds of farm tools mentioned in "Essential Art of Qi Min", but there are more than 100 kinds and 306 drawings included in "Atlas of Agricultural Instruments". When doing this part of the work, Wang Zhen spent the most energy, not only collecting and vividly describing and recording the agricultural tools that were popular at that time, but also drawing restoration diagrams of the ancient lost agricultural tools after textual research. The "Chart of Timing and Palm Activity" and the "Chart of National Agricultural Situation" are also the first creations of "Wang Zhen's Agricultural Book". The original drawing of the latter picture has been lost, and its original appearance cannot be known. The one you see in the book now was added by later generations. The diagram of the time-telling method is a concise summary of the calendar and time-telling issues. The figure uses an eight-fold turntable with the same axis on the plane, from the inside to the outside, to represent the direction of the Big Dipper, the heavenly stems, the earthly branches, the four seasons, the twelve months, the twenty-four solar terms, the seventy-two phases, and the indications of each phenology. agricultural activities that should be carried out. Integrate stars, seasons, phenology, and agricultural production procedures flexibly and compactly. This kind of summary of the main contents of the farmer's monthly order in a small picture is clear, economical and easy to use. It cannot but be said to be an admirable and wonderful idea. The "Movable Type Seal Calligraphy" in the appendix of "Wang Zhen Nong Shu" is the more than 30,000 wooden movable types Wang Zhen asked craftsmen to carve, as well as his own invention of a wheel typesetting plate that can reduce the fatigue of typesetters and improve efficiency.