Spatial distribution of the 1020 member stars along with their proper motions. The grayscale image represents the WISE 22 μm band data, overplotted with the velocity dispersion in proper motion of the 1020 Gaia counterparts of the candidate members. The red dots indicate the locations of these 1020 member stars. The blue arrows illustrate the direction and magnitude of the proper motion vectors relative to the average proper motions of sub-cluster C-1. The location of the central massive star(s), HD 206267, is marked with a white ‘×’ symbol. The scale bar and reference arrow for the proper motion vectors are shown in the panel.