sentence: typical woods include : nanmu , durable softwood zitan ( red sandalwood ) zhangmu ( camphor tree , cinnamomum camphora ) bomu yinxing ( ginkgo biloba ) hongmu ( padauk , redwood or blackwood ) , suan zhi in cantonese longan ( dragon eye ) mahogany methodology classical mudiao is begun by selecting a whole block of wood , sawing it into a regular shape , such as a square flat board , then using edged carving tools to sculpt pictures either in bas-relief or in three-dimensions .