HR diagram of the known MW Li-rich DCEPs. V363 Cas is shown by the filled red circle. Different symbols (see labels) are used for the other four literature stars. The Li-normal DCEPs by Groenewegen (2020) are shown in light grey as reference. Instability strips for DCEP_F (solid lines) and DCEP_1O (dashed lines) by De Somma et al. (2020) as well as evolutionary tracks by Bressan et al. (2012) for Z = 0.01, Y = 0.267 (solid cyan lines) and Z = 0.014, Y = 0.273 (dashed cyan lines) in the mass range 2.6–5.0 M_⊙ are also over-plotted on the data.