Evolution of orbit parameters and WD’s mass. The first panel from top to bottom shows the evolution of 1 − e and orbital period P_b. The second one is the evolution of the average mass transfer rate and mass of the WD. And the last one represents the evolution of mass loss at periastron. The dashed line represents the critical time that the effect of the mass transfer becomes dominant. For each parameter, the critical times are not the same but very close. Here we use the critical time of e for all panels. The last ten orbits are plotted as scatter plots and the rest as line plots.