Two instances of Hα profile asymmetries. The left panel depicts “LAMOST J121906.42+182120.7,” whereas the right panel shows “LAMOST J042836.05+082558.0.” In these panels, the red and green dashed lines denote the integration boundaries, the pink and blue dashed lines indicate the theoretical and actual peak positions of the Hα profile, and the bright blue and yellow lines emphasize the integration regions. For reference, the yellow dashed line presents the outcome of a double-Gaussian fit.