Star polyethylene glycol (PEG) hydrogel due to their unique viscoelastic, biocompatible, and hydrophilic, is widely used in biomaterials, tissue engineering and drug delivery and other biomedical applications. Traditionally characterization of the rheological properties of the hydrogel material is typically dependent on the macro rheometer, i.e. the viscosity is detected, the complex modulus and other rheological parameters by measuring the stress-strain response. However, one drawback is that it is difficult to capture fast dynamic gelation kinetics, can not further characterize the structure of colloids anisotropic behavior. Recently, Department of Chemistry University of Hong Kong Chinese professor Dr. Wei Taohu Liu Wei proposed A method of characterizing an interface based on the rheological properties of the hydrogel near micron sized magnetic probe method, more Effect of group structure of the cluster of small scale, faster and more accurate to observe early local precision forming PEG hydrogel gelled viscoelastic properties , and drawn in the overlap colloid concentration ([123 ] c *) the two-dimensional anisotropic dynamic map nearby. Using the new method is not only a useful addition to the conventional hydrogel materials rheological characterization means, can be more thoroughly reveal the inner relation between the mechanical properties of materials and topologies soft matter. Work related to \”Probing Sol-Gel Matrices and Dynamics of Star PEG Hydrogels Near Overlap Concentration\” was published in Macromolecules on the Dr. Liu Wei for the paper the first author, Professor Wei Tao, and academician Wu Qi as a co-corresponding author of this article.