Plant extracts are based on plants as raw materials. According to the needs of the use of the final product extracted, through physical and chemical extraction and separation processes, one or more effective ingredients in the plant are obtained and concentrated without changing the effective ingredients. The product formed by the structure. Tincture: a medicine made by immersing crude drug plants in alcohol or dissolving chemical drugs in alcohol, such as belladonna tincture, orange peel tincture, iodine tincture, etc., referred to as tincture. The tincture is simple to prepare and easy to store. However, the solvent contains a lot of ethanol, so its clinical application has certain limitations. Children, pregnant women, patients with heart disease and hypertension are not suitable for oral use.