Final binary evolution calculations for δ_ov = 0.00, shown in the initial orbital period-secondary mass (log Pⁱ, M₂ⁱ) plane, where Pⁱ represents the initial orbital period and M₂ⁱ is the initial mass of the donor star (for various initial WD masses, as indicated in each panel). Filled squares indicate SN Ia explosions during the CE phase (the red indicates M_CE > 0.1 M_⊙, the blue 0.1 M_⊙ > M_CE > 0). Filled circles denote SN Ia explosions in the SSS phase (${\dot{M}}_{\mathrm{cr}}\ge |{\dot{M}}_2|\ge \frac{1}{2}{\dot{M}}_{\mathrm{cr}}$ and M_CE = 0), and filled triangles in the RN phase ($\frac{1}{2}{\dot{M}}_{\mathrm{cr}}>|{\dot{M}}_2|\ge \frac{1}{8}{\dot{M}}_{\mathrm{cr}}$ and M_CE = 0). Open circles represent systems that experience nova explosions, preventing the CO WD from reaching 1.378 M_⊙ ($|{\dot{M}}_2|<\frac{1}{8}{\dot{M}}_{\mathrm{cr}}$ and M_CE = 0), while crosses show systems that are unstable due to dynamical mass transfer.