Overview of the entire observed field. The enlarged maps in the first row display several typical hub-filament structures. (a): The background is the integrated intensity map of ¹³CO (3–2) for the G333 complex, and the boxes show several divided subregions. The letters indicate the substructures studied in this work. The red contours show the peak emission of ¹³CO (3–2). (b): Overview three-color map of the observed field by combining ATLASGAL+Planck 870 µm (red) and GLIMPSE 8.0 (green) and 4.5 µm (blue) emission, including the G333 complex and GMC G331.