How to distinguish Chinese herbal medicines smoked with sulfur?

First, the smell, all smoked have a pungent sour taste; Second, look, all herbs that are too bright or too white should be vigilant; 3. Weighing: Chinese herbal medicines smoked with sulfur are heavier than those not smoked; Fourth, the taste, most "sulfur medicinal materials" can taste an abnormal sour taste in the mouth. Radix Codonopsis, Radix Angelicae Sinensis, Bulbus Fritillariae Cirrhosae, Rhizoma Dioscoreae, Fructus Lycii, Lotus Seed, Lily, Tremella, Tremella, etc. It is easy to be infected and discolored, and it is most likely to be taken by illegal drugs. Pay special attention when buying. Once you buy it wrong, you'd better throw it away. Don't be afraid to waste it and harm your health.