HR diagram of the known MW Li-rich DCEPs. OGLE-GD-CEP-0516 is shown by the filled red circle. Different symbols are used for the other five stars from the literature (see labels). The ISs for fundamental (solid lines) and first-overtone (dashed lines) DCEPs by De Somma et al. (2020) as well as evolutionary tracks by Bressan et al. (2012) for Z = 0.008 (solid line) and Z = 0.014 (grey dashed line) in the mass range 2.4–5.0 M_⊙ are also over-plotted on the data.