Why doesn't Gina look half-blood?

Because Gina's mother is Korean, maybe she looks more like her mother, so she prefers Asian faces. Lang Lang's wife Gina doesn't look like a half-blood, but more like a native of China. Especially after learning a mouthful of Northeast dialect from Lang Lang, she looks more like a China native.

However, genes can't be decided by people. Maybe Gina has inherited more Asian looks from her parents, so she feels more like a China. But Gina is really a hybrid. She is a German-Korean mixed-race, her father is German and her mother is Korean. Maybe she looks more like her mother, so she prefers Asian faces.

Extended data

Look at Gina carefully, especially her eyes and nose. Unlike Asians, eyes and nose are German genes. Gina may give the impression that she is not the kind of girl who looks like a foreigner at first sight. Her hair is black and her skin is similar to that of Asians.

The only difference is the eyes and nose. In front of Lang Lang, he joked that Lang's father suspected that Gina's nose was made, but it wasn't. Gina inherited her father's nose. Anyone who has seen Father Lang Lang should know that their noses are almost the same.