Recently, Zhao Yonggang's research team from the Department of Physics at Tsinghua University, leveraging magnetron sputtering technology, has achieved a significant breakthrough. They have developed a method to generate stable, single skyrmion bags at room temperature and in the absence of a magnetic field, within a confined structure using a [Ta/CoFeB/MgO]×15 multilayer film. Employing micromachining techniques, the team fabricated arrays of micro-sized, confined disks of varying dimensions. Intriguingly, disks of an optimal size exhibited a "reticulated" domain structure upon magnetization with a small-angle saturated oblique magnetic field. This unique structure could be transformed into a skyrmion bag structure under the influence of an out-of-plane magnetic field and remained stable even after the removal of the magnetic field. This accomplishment offers a novel approach for the investigation of skyrmion bags within magnetic multilayer film structures.