according to the food safety law of the people's Republic of China, handling hygiene licenses can be divided into production and processing, circulation and sales, and catering licenses. Your major is not related to food. I don't think it is necessary. As for handling personal health certificates, it depends on whether your major is related to imported food. That is, the relevant needs to be handled, and the irrelevant needs not to be handled. You are engaged in building materials sales, of course, you don't need to handle it. After all, building materials can't be eaten, right?