Every week to check, you do the service industry game catering industry, every week to check, self-check once, must be the back of the kitchen a comprehensive comprehensive check, the key to health is sanitation, once a week, once a week, once a month to check four or five times, this is the catering industry, the service industry's self-check, the minimum of January a month to check four or five times The first time I saw this, it was a very good idea to check it out.