Detailed evolution of CO WD+RG binaries as a function of time using the MESA code. The left panels show the case of a nonmagnetic WD and the right panels the case of a magnetized WD (with B = 2.5 × 10⁷ G). All other initial parameters are the same: the initial masses of the WDs and donor stars are 1.2 M _⊙ and 0.8 M _⊙, respectively, with an initial orbital period of 10 days. The evolution of mass transfer, WD/donor mass, orbital period, and the radius of the donors are shown. Wind mass loss is very low (<5 × 10⁻¹³ M _⊙/yr) and is not shown for clarity. RLOF M_dot and Polar M_dot in the figures are ﹩{\dot{M}}_{\mathrm{RL}}﹩ and ﹩{\dot{M}}_{{\rm{p}}}﹩ in the text, respectively.