Comparisons of the Ba abundances calculated by our work ([Ba/Fe]_LGBM) and values determined from N19 ([Ba/Fe]_N19). The yellow line signifies that the predicted value is equal to the target value. The yellow dot represents the point at which ∣[Ba/Fe]_{4554 Å} − [Ba/Fe]_{4934 Å}∣ ≥ 0.5 in N19. The left shows the differences between [Ba/Fe]_LGBM and [Ba/Fe]_N19 in the prediction of 4554 Å (Ba II), and the right shows these differences in the prediction of 4934 Å (Ba II).