No. Double-layer tender beef burger with sauce is a new hamburger product launched by KFC, which tastes good. It's a new hamburger product independently developed by merchants, not technology. Hamburger is a round bread with beef, cheese and so on. It is a kind of food that originated in Hamburg, Germany, and was later introduced to the United States. After the improvement of Americans, American hamburgers are popular all over the world and are the main food in modern western fast food.