In fact, there is generally no professional name, but there are indeed many cosmetic hospitals that call this "Shuangfeng".

Generally speaking, a row of hair on the forehead is called hairline, which can only be abbreviated as "higher (see CCTV host Kang Hui)", "lower (Liu Xiang, but he stayed in long bangs)" and "M-shaped (Yao Ming)".

As for the description of hairline in junior high school biology, I haven't learned it in middle school, but it is really related to heredity. If you want to describe it by shape, junior high school biology should not be too complicated. Some names of plastic surgery hospitals include "Shuangfeng" and "straight hair line".