Why are plums sour?

Sour plum is due to the following reasons. First, the shabby plum was once a young "little bald head", but fate arranged it to the plum processing factory. For Huamei, this is a devilish place. The processing factory uses "torture" to dry the moisture of the plum. In an instant, the plum lost its moisture and luster, and its body changed from blue to purple, scarred. The smooth epidermis loses moisture and becomes wrinkled. You see, wrinkled face, dark purple skin, no moisture and luster, this shabby appearance makes it suddenly infamous, ashamed and ashamed to see people. Therefore, the staff in the mall had to add a bag for it ... Second, the sad and shabby words reminded Mei of her past in the food bag. At first, it lived in an orchard with apples and pears. They are so happy. Apple is red, pear is Huang Chengcheng, and the words are green and vague. No one has an inferiority complex. Go to school together, leave school together, talk and laugh together, how wonderful! But now … when I think of the apples at the counter, I am praised: "Wow, what a big apple" and "what a red apple". It's tempting under the light. It smells delicious. But I want to hide in the food bag, in the corner of the counter, covered by a lot of food. The more I think about it, the sadder it gets. Third, jealousy is very strong. Since plum has lost its former glory, it is not as beautiful as apples and pears, but they once lived together and had a wonderful time. So he is good at complaining, and of course he is full of jealousy for his friends. "Hum, what's the big deal? At first, I was like him. " Huamei wants to talk to almost every customer. But who wants to hear it? Therefore, if you are poor and sad, you will be jealous and lose control. So the fruit acid in the body accumulates more and more. Finally, it became a sour plum that can sour teeth.