Ceramic bowls change color when heated. Diaoyutai health care porcelain bowl is made of low temperature glaze. When the temperature is high, the color will change, forming various interesting patterns, so it will change color. Health porcelain is a kind of nano-composite active bioceramics. Health-preserving porcelain developed by China Extraction Porcelain Industry is made by mixing and firing various mineral elements, oxidized metals and ceramic raw materials.