The rule cognition and theoretical construction of spatial pattern in China

"Hu Huanyong Line", T-shaped development model, and dual-nuclei structure model can be roughly summarized as a "one-line, two-axis, and dual-nuclei" structure. They are all rule cognition and theoretical refinements on spatial pattern in China which were proposed by Chinese human geographers in different periods. "Hu Huanyong Line" is proposed based on the regular recognition of regional differences. This is the extension and expansion of geographical differentiation laws of physical geography in human geography, following the basic assumption of homogeneous regions. The discovery of the T-shaped model of Lu Dadao and the dual-nuclei structure of Lu Yuqi transcended the analytical thought of regional differentiation laws. They follow the basic assumptions of functional areas. Among them, the T-shaped model is the practical application of the point-axis system theory proposed by Lu Dadao in China. From the phenomenon perspective, the dual-nuclei structure is attached to the T-shaped development model, but subsequent research has completed the transformation from special to general. It has accomplished the whole process of scientific research in scientific discovery, mechanism analysis, mathematical derivation and practical application. Eventually, it becomes a regional spatial structure theory with strong broad applicability. From the theoretical level, "Hu Huanyong Line" based on the assumption of homogeneous region and T-shaped model based on the assumption of functional region belong to the analysis results of spatial differentiation law, but they can also be called theories. They are individual theories in geography, while the dual-nuclei structure theory belongs to a more general and applicable theory in the general scientific sense. Obviously, the trinity analysis of the "Hu Huanyong Line", the T-shaped model, and the dual-nuclei structure theory shows that, China is a country that is very suitable for regional analysis and geographical laws and theories refinement based on this. The research in this paper can provide research ideas and method references for the summary of regional spatial structure laws and theory refinement of human geography. © 2021, Science Press. All right reserved.