This chapter presents the historical link between the compilation of CFT and the invention of hangŭl through supporting historical records, highlighting the fact that Korea’s seasoned farmers possessed the creative technologies earnestly sought by the state in the fifteenth century. The development technologies for early-sowing rice varieties and legume crops were sown on top of the embankments as they were resistant to drought in their early stages of growth. Thus, the intercropping of barley and legumes, wherein the former needed shade and the latter needed sunlight, was the perfect match. The technologies explained as the origin of extremely rapid population growth and the development of labor-intensive industries which continued until the eighteenth century in East Asia’s Industrious Revolution.