Tricolor image of W28 in the radio (red, 1.3 GHz continuum), Hα (green), and X-ray (blue, 0.4-2.3 keV) bands. A square root color scale is used to highlight faint diffuse emissions in the radio and X-ray images. The white polygon regions are used for spectral extraction and analysis, and the dashed cyan regions correspond to the sky background. The yellow contours correspond to the MWISP CO intensity in the –20-10 km s⁻¹ (Tu et al. 2024). The optical nebulae southeast and northeast of W28 are the Lagoon Nebula Messier 8 and the Trifid Nebula Messier 20, respectively.