2. Roast pig, fragrant pig and boiled chicken are commonly used as sacrificial food during the Tomb-sweeping Day. However, as the temperature continues to rise, such foods can easily go bad after being exposed to sunlight, photochemical and thermal decomposition. Therefore, when buying and eating these foods, we should pay attention to the temperature and conditions for storing them, and finish eating as soon as possible.

3. Glutinous rice, mugwort glutinous rice cake and steamed pork with rice flour are the special foods of the “Sanyuesan Festival” in Guangxi and are very popular with consumers. Attention should be paid to the appearance of these foods before buying them. Once the taste or color of the food is abnormal or with sediment, the food is likely to go bad and should not be eaten.