Please read about Ground-Aged Wenwan Walnuts before purchasing We also call it Di Men walnut,This is a kind of unique and precious ground-aged collectible walnut, a top-grade variety in the traditional Chinese wenwan (hand-played collectible) category. Unlike ordinary collectible walnuts, it adopts the rare natural ground-aging craft. After falling naturally from the tree, it is placed in a specific natural soil environment for closed aging and drying. During this process, it absorbs the essence of nature slowly, forming a unique natural texture and mellow color without any manual chemical treatment or polishing.