Why did Tunchang withdraw betel nuts?

It hurts. Areca catechu, monocotyledonous plant class, arboreal. Areca catechu contains arecoline, lauric acid and other substances harmful to human body. Eat areca is harmful to human body, which can lead to symptoms such as black teeth, loose gums, oral mucosal fibrosis, and even cancer in severe cases, so it is removed from the shelf. Tunchang, a municipality directly under the Central Government of Hainan Province, is located in the north-central part of Hainan Island, with a total area of 123 1.5 square kilometers.