1, when ordering at McDonald's and KFC, the wait staff will put a piece of paper similar to advertising paper on the tray, and when you eat fries with ketchup, you squeeze it directly onto the paper.

2. Some people squeeze inside the boxes of other foods.

3, There are also people who are not sure about the hygiene of that paper and squeeze the ketchup on the napkin.

4, ketchup is a sauce-like concentrated product of fresh tomatoes. Bright red sauce body, with the unique flavor of tomatoes, is a characteristic condiment, generally not directly into the mouth. Ketchup by the ripe red tomatoes by crushing, pulping, removing the skin and seeds and other coarse and hard substances, after the concentration, canning, sterilization and become.

5, ketchup is often used as fish, meat and other food cooking condiments, is to increase color, add acid, help fresh, lush flavor of the best products. The use of ketchup is an important part of the flavor characteristics of Hong Kong and Guangdong cuisine.