EXTENDED ABSTRACT: Despite the maturity of classical material growth theories, material manufacturing remains a highly empirical discipline, leading to a new material development cycle that can last 20-30 years or longer. To shorten the development cycle of new materials, our research group has devoted the past 20 years to developing atomic-scale theories that can guide material growth. In this presentation, I will introduce the differences between mechanism-driven material manufacturing, trial-and-error material manufacturing, and data-driven material manufacturing (Fig. 1), and clarify that only a deep understanding of the mechanisms of material manufacturing can enable us to achieve precise material manufacturing. I will then illustrate the importance of mechanism-driven material manufacturing with a series of landmark achievements our group has made in low-dimensional material growth mechanisms：
1)Our understanding of the growth mechanisms of carbon nanotubes and the controlled synthesis of carbon nanotubes, including the nucleation theory, growth kinetics, and structural selection of carbon nanotubes.
2)Our understanding of the growth mechanisms of graphene and other twodimensional materials and the fabrication of large single crystals of two-dimensional materials, including the theory of two-dimensional material epitaxial growth, methods for fabricating various two-dimensional large single crystals, and experimental realization.

Keywords: Mechanism, materials manufacturing, MLFF