1. The upper lip of Bai Baihe is slightly thicker, and the upper lip of Wang is thinner, showing an M-shape.
Left: Wang Right: Bai Baihe
Bai Baihe likes to laugh, but Wang doesn't.
Left: Bai Baihe Right: Wang
According to the theorem 1, because Wang has an M-shaped upper lip, her whole mouth is usually shaped, with a bitter gourd face, which is not close to the people and needs to keep smiling. When Bai Baihe doesn't laugh, he feels like a V, and he likes to laugh, showing his upper gums.
Left: Wang Right: Bai Baihe