Expand knowledge: Ketchup comes from China. In China in the17th century, sailors from England sailed for trade. Ketsiap is a condiment made of fish sauce and spices, which was found in China sailors. After British sailors tasted this delicious condiment, they brought it back to the west and called it ketchup according to China's pronunciation. /kloc-in the 0 th and 8 th centuries, Heinz Company began to sell tomato sauce made from tomatoes. Since then, tomatoes have become the main raw material for making ketchup. So ketchup is called "ketchup" by everyone.