In this appendix, we present the full sample of MWDs discovered in this work. For DA MWDs, the rest-frame positions of the Balmer series (Hα, Hβ, and Hγ) are indicated by red dashed vertical lines. For helium-rich (DB) MWDs, blue dotted lines indicate the rest-frame positions of prominent He I transitions. In cases where the spectrum is dominated by carbon features (DQ MWDs), no reference lines are plotted. The mean surface magnetic field (Bmean ) is provided for confirmed targets alongside the LAMOST designation.