The six don'ts of food safety are: don't look at the license, don't look at the packaging, don't look at the name of the factory, don't look at the date, don't look at the text, don't look at the logo. The six don'ts are: don't buy food with excessive additives, don't buy impurity-contaminated food, don't buy food with abnormal flavor, don't buy food with insufficient portion, don't forget to buy low-priced food, and don't forget to ask for shopping vouchers.