Coconut shell is the endocarp of a palm plant, which contains 0.6 1% ash, 36.5 1% lignin, 53.06% cellulose and 29.27% pentosan. It can treat yin, wind, cold and heat. Plant morphology can be found in coconut skin strips. Carve some patterns and characters on coconut shells, and even make doll heads and various folk works of art with birds singing and rain. The chemical composition of coconut shell is 0.33% ash, 36.5 1% lignin, 53.06% cellulose and 29.27% pentosan. Cellulose contains pentosan 20.54%, and the main component of ash is potassium hydroxide.