Lettuce (scientific name: Lactuca sativa) is an annual or biennial herbaceous plant in the genus Lactuca of the Asteraceae family. It is a very common edible vegetable. People in China, Japan and other countries often eat it after cooking. In Western culture, people often eat it raw in salads, hamburgers and other foods. In Hong Kong, lettuce is also called Tang lettuce to distinguish it from Western lettuce. ?

Lettuce can be divided into two categories: leaf lettuce and stem lettuce. Leaf lettuce is also called lettuce, and stem lettuce is also called lettuce and bamboo shoots. Lettuce has many names, and is called "Qianjincai", "lettuce" and "shicool" in herbal medicine. Stem lettuce is also called lettuce and bamboo shoots. There are more lettuce cultivation areas than lettuce in various parts of China. The meat of lettuce is tender and the stems can be eaten raw, cold, stir-fried, dried or pickled. Lettuce is mainly eaten as leaves or leaf balls. Lettuce stems and leaves contain lettuce, which is bitter in taste and strong in high temperature and drought. It can enhance gastric juice, stimulate digestion, increase appetite, and has analgesic and hypnotic effects.