Written in the second year of Qianlong, it was presented to the court in the seventh year of Qianlong, and an imperial order was issued. Every eight doors. The weather is divided into four sub-orders, and the festival of ploughing and harvesting is also clear. It is said that soil is suitable, divided into six grades, and the benefits of dryness and dampness are also high. It is said that there are nine sub-orders and other physical properties. Left, divide it into ten sub-orders, and do your best. There are nine levels of persuasion, and the policy of attaching importance to agriculture is also important. It is said that gathering is divided into four sub-classes, which is also a system to prepare for famine. The word "Yu Geng" is divided into five subheads, which is also a matter of breeding livestock. It is said that sericulture is divided into ten suborders, and silk weaving is also used. The weather is crowned with a summary, the other seven doors are crowned with a comprehensive examination, and the imperial edict is composed of poems and recorded with the class. In the past, Duke Zhou wrote a book, taking no escape as the foundation of eternal life. The so-called no escape makes it difficult for the prophet to harvest. Therefore, attaching importance to agriculture and millet is the foundation of governing the world. The planting methods of Guanzi and Lu Lan are different from other articles, and the wording and sentences are standardized. Those who cover the ancient times must have special books, and philosophers have to quote them, which is now invisible. Liu Xiang's "Seven Views" comprehensively classifies nine streams, including agriculture, apricot and pomegranate, with a total of 19 species. There are five kinds of edible flowers and leaves, next to pine trees. There are four kinds of edible leaves and barks, from elm to old trees. Draw its shape in case of famine. At the end of the Ming Dynasty, hunger was still there, and Shan wrote this book, which was also the intention of the benevolent. There are more than 400 kinds in the preface, but only 262 kinds in the compilation, and the cover has been managed. Wang Pan's Wild Recipe is widely recorded, which is also different from the Disaster Relief Materia Medica of the Ming Dynasty and Zhou Dynasty, and none of his books survive in the world. Today, Jia Sixie's "Qi Yao Min Shu" is the oldest, but the exegesis of celebrities can't be solved, whether it is a farmer or a weaver girl. Along the way, there are countless authors, but Wang Zhen and Xu Guangqi are the most famous, and the omissions are complicated and inevitable. The year after my emperor, concubine Yu, deeply understood the meaning of Yao Dian's timing and Yu Ting's heart of timing, so she specially wrote a letter to delete and compile books, and compiled them for this purpose. It is beneficial to be accurate in today's consideration of the past. A close study of the old chapter Chen Zhengdian is based on self-interest and people's wishes, not farmers' words.

-right "peasant class" ten, a total of 195 volumes, all recorded by the Wen Yuan Pavilion.