Calculated ﹩{M}_{\mathrm{WD}}\mbox{--}{P}_{\mathrm{orb}}﹩ relation based on different evaporation efficiencies and AML modes, depicted with different symbols. The colors represent the maximum surface temperature of the WD at the beginning of the cooling phase. The thin solid line shows the theoretical ﹩{M}_{\mathrm{WD}}\mbox{--}{P}_{\mathrm{orb}}﹩ relation given by Lin et al. (2011) for Pop I stars. The small black dots represent the Galactic binary MSPs in the field with WD companions, the orange dots represent ones with ultra-light (with mass ﹩\lt 0.08\,{M}_{\odot }﹩) companions, and the error bars correspond to orbital inclination from 90° to 26°, covering 90% probability of the WD mass distribution. Some interesting systems, PSR J0751+1807, PSR J1653-2054, PSR J1748-3009, PSR J1816+4510, and PSR J1850+0242, are also indicated.