Modelling of the multi-wavelength spectra of the SrcX southlobe (top-left), northlobe (top-right), and disk (bottom-left). The blue and purple butterfly shadow regions come from recent LHAASO results (Cao et al. 2024). The orange data points come from 4FGL J0426.5+5434 as measured by Devin et al. (2020). Top left: Solid, dashed, and dash-dotted magenta lines show the spectra produced by escaping ions with different values of χ indicated, and the black solid line shows the hadronic model for trapped protons with a broken power-law distribution. Top right: Leptonic models, where the power law (ECPL) and broken power law (ECBPL) are presented by red dashed and grey solid lines, while the orange and green dashed lines show a special ECPL and ECBPL case where the cut-off energy is fixed to 25 TeV. The radio fluxes and the X-ray upper-limit come from Zeng et al. (2021) and Devin et al. (2020), respectively. Bottom left: Hybrid model for the total γ-ray flux shown as black solid, red dashed, orange dashed lines added by different leptonic spectral types. Blue data points are derived from the best-fit results measured by Devin et al. (2020) for comparison. Bottom right: Dependence of the SED on the SNR age and r_s. The solid, dotted, dashed, dash-dotted lines correspond to r_s = 21.4/35/45/55 pc, respectively.