These things are not a big problem. The key is to study them clearly in advance. Well, is the product you are going to choose suitable for the local taste? Then, when choosing products to learn, well, it is necessary to inspect the teaching place, the whole process of their processing methods for these products, and whether this series of additives are used? Besides, I have to ask clearly, er, is there a detailed formulation process for the practice of these products? Well, is there a detailed ratio? That is to say, quantitatively, if you have all these things, you can engage in the catering industry. We have been doing it for 12 years. If it is convenient, you can also add attention or send a private message.