Cao Shi uses industrial chilli essence, which is unhealthy. Industrial chilli essence, alias chilli oleoresin, is a product extracted and concentrated from chilli, which has a strong spicy taste and is used to make food seasoning. Capsaicin contains 100 complex chemical substances, such as capsaicin, protein, pectin, polysaccharide, capsanthin and so on. Capsaicin is not an illegal additive, but an extract of natural food ingredients. Because capsaicin is a concentrated product of spicy substances in pepper, it can produce a high degree of spicy taste that natural pepper can't match, so don't try food containing capsaicin when the skin, eyes, mouth, respiratory tract and digestive tract are damaged, inflamed or festered. And don't eat undiluted Chili essence.