Normalised metallicity (top) and heavy-element mass (bottom) as a function of planet mass for 0.3 ≤ M_p(M_J)≤2. The scatter points and error bars show the normalised metallicity or heavy element mass inferred by the thermal evolution models. Solid lines show the fits constructed by Bayesian regression, and the shaded contours are the 1σ and 2σ uncertainties. Planets around FGK stars are depicted in blue, while those around M-dwarfs are in red. The grey dashed line shows the fit from Thorngren et al. (2016) for comparison.