First of all, how many purple casseroles are sold now are true. Really purple sand can't be used to make pots, and it can't be sold at a high price. How much does it cost to make purple sand into a small teapot? Smaller ones, not all of them (artists), are also several thousand.

It is best to fry in a casserole; Chinese herbal medicines can be soaked and eaten, and the effect is better. So it won't reduce the efficacy. Don't worry!