1400 years ago, Jia Sixie, an agronomist in the Northern Wei Dynasty, wrote in his book What?

The Book of Qi Yao Min was written in the late Northern Wei Dynasty (533 -544 AD). It is a comprehensive agricultural work written by Jia Sixie, an outstanding agronomist from Northern Wei Dynasty to Southern Song Dynasty to Liang Dynasty. It is also one of the earliest monographs in the history of agriculture in the world and the earliest complete agricultural book in China.

The book consists of 92 articles, with a volume of 10. It systematically summarizes the working people's experiences in agriculture and animal husbandry, grain processing and storage, utilization of wild plants and drought-resistant methods in the middle and lower reaches of the Yellow River before the 6th century, and introduces in detail the seasons, climate and the relationship between different soils and different crops. Known as "China Ancient Agricultural Encyclopedia".