Why should tartary buckwheat tea be smoked with sulfur?

Sulfur fumigation has always been one of the production processes of Chinese herbal medicines in China, because most Chinese herbal medicines are natural plants or minerals, which are prone to insects and mildew, and their efficacy will change after long storage. Moreover, fumigation of tartary buckwheat with sulfur is beneficial to the storage of tartary buckwheat and the stability of its efficacy.