Eating watermelon during the cold winter can cause stomach pain, so avoid eating or eat less off-season foods. Plants that grow in water, damp, swampy places must have water-resistant properties. On sunlit hillsides, most of the medicinal herbs growing there are heat-clearing because they can resist heat, and resisting heat means they are cold in nature.
Plants like Codonopsis pilosula, Polygonatum odoratum, and Polygonatum sibiricum that grow on the shadier hillside have yin-nourishing effects. In deep mountain valleys where ice and snow don't melt, Aconite grows, its lateral roots are Aconite, and it develops resistance to cold and moisture, treating rheumatoid arthritis and symptoms of genuine Yang Qi deficiency, such as feeling cold all over and cold hands and feet.
It's not just plants; animals are the same way."
