First, take out the lipstick and dip it in a proper amount with a lip brush. You can also draw an "X" on the lip peak of the upper lip directly with the brush that comes with lip gloss to highlight the inconspicuous lip peak.
Second, fix a point on the bottom of your lips with a lip brush. If the lip shape is not obvious, the fixed point can be lower.
Third, start from the highest point of the lip peak and start connecting the corners on both sides. When reaching the corner of the mouth, the lip line can be retracted and the high lip peak can be highlighted.
Fourth, color the blank part of the lips.
Fifth, you can get a good-looking lip shape through makeup.