Longan should be Longan meat, which can be used to treat deficiency of qi and blood, dry mouth and throat, palpitations (rapid heartbeat, often accompanied by panic) and forgetfulness. Longan, also known as Yuanmei, Guiyuan, belongs to the qi tonic under the tonic medicine, and its medicinal part is the aril of longan of the Sapindaceae plant. It is sweet in flavor and warm in nature. It belongs to the heart and spleen meridians. Its main effects are to tonify the heart and spleen (tonifying the heart and spleen with tonic drugs), nourish the blood and calm the mind (stabilizing the mind and soothing the emotions by nourishing the blood). When used for tonifying the heart and spleen, benefiting qi and blood, it can be combined with ginseng, angelica sinensis, and sour jujube nut; when used for treating old age, post-partum, or after a serious illness, it can be used alone, or combined with other products that nourish blood and qi. Adverse effects are not clear, and this product should not be taken by people with phlegm and fire in the spleen and stomach, dampness and stagnation, dyspepsia, nausea and vomiting. It is best to use this drug under the guidance of a professional doctor.