Prediction results for [Fe/H] and [α/Fe] with and without the UV band spectra (ranging from 2550–10 000 Å and 4000–10 000 Å, respectively). The top panels compare the predicted and actual values of [Fe/H] and [α/Fe] when the UV band spectra are included. The colour intensity represents the density of data points, ranging from blue (low density) to red (high density). The dashed lines represent the identity line. The bottom panels show the prediction results without the UV band spectra.