Carbonate factories or production systems, are benthic carbonate associations that show variations in their dominant precipitation mode, mineral composition, and depth range of production as well as growth potential. If the planktonic carbonate factory is termed as a fourth system and the seep and continental carbonates (fluid- related factory) that are not included within this conceptual scheme, a threefold subdivision of the benthic carbonate production systems enriched with knowledge derived from the carbonate factory principle has been proposed on a geologic scale, ie. ① T- factory, in which the T is derived from tropical or “top- of- the- water- column”; ② the C- factory, in which the C stands for cool- water or controlled precipitation; ③ the M- factory, in which M represents microbial, micrite, or mud- mound. As the first period of the Phanerozoic Eon that inherited the past and will usher in the future, the Cambrian is characteristic of the evolution of biomineralization marking the ‘Cambrian explosion’ that is coupled with increase in microbial carbonates predominated by organomineralization, the former might have benefited from the relatively high content of oxygen within the atmosphere and the latter might be genetically related to the highest content of CO2 within the atmosphere, which led to the formation of the photozoan T- and M- factories in a calcite sea that was tied to the cyanobacterial bloom. This photozoan T- factory is marked by widespread distribution of radial ooids induced by photosynthetic biofilms and the photozoan M- factory occupied the shallow environments normally filled by the tropical factory, both of which point to the photosynthetic mechanism. An excellent example for these photozoan T- and M- factories are from the Zhangxia Formation of the Cambrian Miaolingian at the Jiawang section in Xuzhou City of Jiangsu Province of the southern North- China Platform. A set of oolites with a thickness of about 31 m that are predominated by radial ooids induced by photosynthetic biofilms as well as a set of microbial reefs with the thickness of about 82 m that are predominated by leiolites and dendrolites make up the forced regressive system tract of the third- order depositional sequence that is composed of the Zhangxia Formation at the Jiawang section, which is incarnated as an upward changing succession from the photozoan T- factory to the photozoan M- factory. The observation and research in this study will broaden the further understanding of carbonate production (i.e. the carbonate factory) in the calcite sea of the Cambrian that was tied to the bloom of cyanobacteria, which resulted from the following reasons: ① the M- factory is not well constrained in the modern world; ② describing, and lots of intricate and difficult 〖JP2〗problems having only conjectural answers; ③ characterizing〖JP〗 and interpreting the nearly infinite variety of carbonate rocks remains a challenge.