Ketchup bought in supermarkets can be eaten directly on bread, and fresh tomatoes can be eaten raw, of course, as a concentrate of fresh tomatoes, but ketchup is generally not eaten directly, but as a cooking seasoning.

Tomato paste is a concentrated paste product of fresh tomatoes. It is a bright red sauce with the unique flavor of tomato, and it is a very distinctive condiment, which is generally not eaten directly. Tomato paste is made from ripe red tomatoes by crushing, pulping, removing rough substances such as peel and seeds, concentrating, canning and sterilizing. Tomato paste is often used as a cooking seasoning for fish, meat and other foods, and it is a good seasoning for increasing color, acidity, freshness and fragrance. The application of tomato sauce is an important seasoning content to form the flavor characteristics of Cantonese cuisine in Hong Kong.

Tomato sauce, tomato sauce, or tomato juice is a common condiment made from ripe tomatoes. The basic ingredients of tomato sauce are tomato, vinegar, sugar, salt, fragrant seeds and cloves, and vegetables such as cinnamon, onion and celery are often added.