Lion head is a kind of wenwan walnut. While wenwan walnut is used as a plaything, it has also become an artistic treasure favored by players through the carving of folk artists.

Lion head is a kind of wenwan walnut. Walnut belongs to Juglandaceae, a deciduous tree. Its fruit period is 10 month, and its fruit is nearly spherical, with a diameter of 3-5 cm. The endocarp is hard, wrinkled and yellowish brown, which is what people call "walnut".