Question: What material was used to carve out the shape of a Chinese cabbage head, an example being the Napa, a type of cabbage originating in the Beijing area of China and widely used in East Asian cuisine, which features a locust and katydid camouflaged in the leaves?
Sentence (from "Napa cabbage"): In much of the world, this is the vegetable referred to as "Chinese cabbage".
Relevant evidence: No