You can't. According to the public health network, rice paste is a traditional food in southern China, and borax is a commonly used food additive, which is mainly used to process pasta, cakes, bean products and other foods, and has the functions of toughening, tackifying and antisepsis. However, borax also has a certain impact on human health. Excessive intake may cause poisoning symptoms such as dizziness, nausea, vomiting and abdominal pain. Therefore, for the sake of health and safety, borax should not be added to rice slurry.