A small black bottle of mustard olives in the supermarket, and eating steamed buns. The shape of olives is a small bottle, which is black. Use it to eat with steamed buns or with rice. Therefore, the black bottles in supermarkets are olives, and they are very popular in supermarkets. Olive vegetables are a flavored side dish in the Chaoshan area of ??Guangdong. They belong to Chaozhou cuisine in the Cantonese cuisine. They are a special variety of pickles in the Chaoshan area and an important part of Chaoshan food culture. It is made from the mellow taste of olives and the plump leaves of mustard greens.