Why is Hunan betel nut made dry?

The main reason why Hunan betel nut is dried is that many food additives are added to it, which can improve the taste and storage time of the food.

And there are not only dry betel nuts in Hunan, there are also wet betel nuts. However, due to storage time and weather conditions, once the wet betel nut dries, the taste will become very bad, so it gradually turns into dry betel nut. It's the Lord