In spring, you should eat more food that warms and tonifies the yang. Onion, garlic and leek are the best products for nourishing liver and strengthening yang. Spinach soothes the liver and nourishes blood, jujube is flat and sweet, nourishing the liver and strengthening the spleen, so it should be eaten often. In spring, in addition to protecting the liver, we should pay attention to supplementing trace element selenium, and eat more selenium-rich animals and plants, such as sea fish, shrimp, beef, quail eggs, sesame seeds, almonds, medlar, cowpea and day lily. It can improve human immune function and is beneficial to health care.