It is native to West Asia and Central Asia. Since Zhang Qian, an envoy to the Western Regions during the Han Dynasty, brought garlic back to China and settled there, it has a history of more than 2,000 years. Garlic is an indispensable seasoning in human daily life. It can remove fishy smell and enhance flavor when cooking fish, meat, poultry and vegetables. Especially in cold dishes, it can enhance flavor and kill bacteria. Traditionally, when people usually refer to garlic, they are referring to garlic heads.