Li evolution of the eRGB stars. Left panel: Model with Li depletion and ^LiY_nova = 2.02 ×10⁻⁵M_⊙ is colour-coded by the normalised SFR, while the model with LⁱY_nova = 3.7 × 10⁻⁶M_⊙ is shown by the orange line. A possible outlier star is circled in grey. Upper right panel: Zoom-in to the region of −1.05 ≤ [Fe/H] ≤ −0.75 of the left panel. Bottom right panel: Stellar distribution in Li abundance.