Persistent spectral parameter evolution during the 2024 outburst. The black triangles represent the fitting results of the model tbabs*(diskbb+bbodyrad), the red triangles the fitting results of tbabs*(diskbb+nthcomp), and the blue triangles the fitting results of tbabs*nthcomp. The yellow squares represent the results of joint fitting between Insight-HXMT ME and NICER, while triangles in other colors correspond to the fitting results based on NICER data alone. The flux calculated here is the bolometric flux (unabsorbed) in the 0.6−10 keV range.