The official kiln selenium-enriched purple sand health pot Kangxi Royal limited collection is true. The official kiln selenium-enriched purple sand health pot Kangxi royal products are valuable and the collection is true. Collection, the original meaning is collection, preservation and preservation. The collection is divided into national collection and folk collection, and the national collection is kept in the museum. The quality of folk collections is also improving year by year, and the collection period is getting longer and longer.