It is not allowed to apply porcelain waist twice a day. According to official website's inquiry, porcelain waist products contain active ingredients or certain chemicals, which will cause excessive irritation to the skin if used frequently. The skin needs proper rest and recovery time, and continuous application will cause skin discomfort, inflammation or allergies. Frequent application of porcelain waist will destroy the natural protective barrier of skin, resulting in dry, sensitive or easily damaged skin. Therefore, it is impossible to apply a small porcelain waist twice a day. Porcelain waist slimming products can be used in the studio or at home. It is a salt-coated product of traditional Chinese medicine slimming liquid, which is very safe and effective.