Ketchup is a sauce-like concentrated product of fresh tomatoes that was first invented by the Chinese in the 19th century. It is a bright red sauce body with a unique flavor of tomato. It is a distinctive condiment. It is generally not directly accessible. Ketchup is made by crushing, beating, and removing rough and hard substances such as skin and seeds from mature red tomatoes, and is then concentrated, canned, and sterilized. Ketchup is often used as a seasoning for fish, meat, and other foods. It is a seasoning product for coloring, adding sour, refreshing, and fragrant. The use of ketchup is an important seasoning for Hong Kong and Guangdong cuisine.
Tomato paste, tomato paste, or tomato sauce, is a commonly used condiment made from ripe tomatoes. The basic ingredients of tomato sauce are tomatoes, vinegar, sugar, salt, allspice, cloves, cinnamon, onions, celery and other vegetables are also often added.