Guanzi is an important technological literature in xianqin periods , which includes abundant technological thought , such as agricultural thought , mathematic thought , astronomic thought , calendric thought and iatrical thought .
This paper classifies production style in pre-qin into four stages , according to the main problems and its transformation in production development , which includes : 1.product stage ; 2.soil stage ; 3.climate and calendric stage ; 4.irrigating agriculture stage .