Composite DESI Legacy survey image of SPT-CL J0217−5014 using g-, r-, and z-bands data. The white dashed circle shows the R₅₀₀ region of SPT-CL J0217−5014. Four galaxy clusters identified by Zou et al. (2022) using DESI DR9 data are marked by cyan dashed circles centred on the BCGs with a radius of R₅₀₀. The BCGs are marked by yellow circles. The photometric redshifts at their BCGs are marked as well. In the inserted zoom-in view of SPT-CL J0217−5014, the X-ray contours shown in Fig. 3 are overlaid, and the distribution of member galaxies is indicated.